diff --git a/core/composer.json b/core/composer.json
index 71f07d0..72f5327 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -105,7 +105,6 @@
         "drupal/image": "self.version",
         "drupal/inline_form_errors": "self.version",
         "drupal/language": "self.version",
-        "drupal/layout_discovery": "self.version",
         "drupal/link": "self.version",
         "drupal/locale": "self.version",
         "drupal/minimal": "self.version",
diff --git a/core/config/schema/core.entity.schema.yml b/core/config/schema/core.entity.schema.yml
index 711ca0f..e05a71e 100644
--- a/core/config/schema/core.entity.schema.yml
+++ b/core/config/schema/core.entity.schema.yml
@@ -84,6 +84,12 @@ core.entity_view_display.*.*.*:
       sequence:
         type: boolean
         label: 'Value'
+    layout_id:
+      type: string
+      label: 'Layout ID'
+    layout_settings:
+      type: layout_plugin.settings.[%parent.layout_id]
+      label: 'Layout settings'
 
 # Overview configuration information for form mode displays.
 core.entity_form_display.*.*.*:
@@ -135,6 +141,12 @@ core.entity_form_display.*.*.*:
       sequence:
         type: boolean
         label: 'Component'
+    layout_id:
+      type: string
+      label: 'Layout ID'
+    layout_settings:
+      type: layout_plugin.settings.[%parent.layout_id]
+      label: 'Layout settings'
 
 # Default schema for entity display field with undefined type.
 field.formatter.settings.*:
diff --git a/core/core.services.yml b/core/core.services.yml
index 8bce755..1b753cb 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -640,6 +640,9 @@ services:
   plugin.manager.display_variant:
     class: Drupal\Core\Display\VariantManager
     parent: default_plugin_manager
+  plugin.manager.core.layout:
+    class: Drupal\Core\Layout\LayoutPluginManager
+    arguments: ['@container.namespaces', '@cache.discovery', '@module_handler', '@theme_handler']
   plugin.manager.queue_worker:
     class: Drupal\Core\Queue\QueueWorkerManager
     parent: default_plugin_manager
diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index f180cbd..b0fed54 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1697,6 +1697,19 @@ function template_preprocess_breadcrumb(&$variables) {
 }
 
 /**
+ * Prepares variables for layout templates.
+ *
+ * @param array &$variables
+ *   An associative array containing:
+ *   - content: An associative array containing the properties of the element.
+ *     Properties used: #settings, #layout.
+ */
+function template_preprocess_layout(&$variables) {
+  $variables['settings'] = isset($variables['content']['#settings']) ? $variables['content']['#settings'] : [];
+  $variables['layout'] = isset($variables['content']['#layout']) ? $variables['content']['#layout'] : [];
+}
+
+/**
  * Callback for usort() within template_preprocess_field_multiple_value_form().
  *
  * Sorts using ['_weight']['#value']
diff --git a/core/lib/Drupal/Core/Entity/Display/EntityDisplayWithLayoutInterface.php b/core/lib/Drupal/Core/Entity/Display/EntityDisplayWithLayoutInterface.php
new file mode 100644
index 0000000..8c14d63
--- /dev/null
+++ b/core/lib/Drupal/Core/Entity/Display/EntityDisplayWithLayoutInterface.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace Drupal\Core\Entity\Display;
+
+use Drupal\Core\Layout\LayoutInterface;
+
+/**
+ * Provides a common interface for entity displays that have layout.
+ */
+interface EntityDisplayWithLayoutInterface extends EntityDisplayInterface {
+
+  /**
+   * Gets the default region.
+   *
+   * @return string
+   *   The default region for this display.
+   */
+  public function getDefaultRegion();
+
+  /**
+   * Gets the layout plugin ID for this display.
+   *
+   * @return string
+   *   The layout plugin ID.
+   */
+  public function getLayoutId();
+
+  /**
+   * Gets the layout plugin settings for this display.
+   *
+   * @return mixed[]
+   *   The layout plugin settings.
+   */
+  public function getLayoutSettings();
+
+  /**
+   * Sets the layout plugin ID for this display.
+   *
+   * @param string|null $layout_id
+   *   Either a valid layout plugin ID, or NULL to remove the layout setting.
+   * @param array $layout_settings
+   *   (optional) An array of settings for this layout.
+   *
+   * @return $this
+   */
+  public function setLayoutId($layout_id, array $layout_settings = []);
+
+  /**
+   * Sets the layout plugin for this display.
+   *
+   * @param \Drupal\Core\Layout\LayoutInterface $layout
+   *   A layout plugin.
+   *
+   * @return $this
+   */
+  public function setLayout(LayoutInterface $layout);
+
+  /**
+   * Gets the layout plugin for this display.
+   *
+   * @return \Drupal\Core\Layout\LayoutInterface
+   *   The layout plugin.
+   */
+  public function getLayout();
+
+}
diff --git a/core/lib/Drupal/Core/Entity/Display/FieldLayoutBuilder.php b/core/lib/Drupal/Core/Entity/Display/FieldLayoutBuilder.php
new file mode 100644
index 0000000..4223b93
--- /dev/null
+++ b/core/lib/Drupal/Core/Entity/Display/FieldLayoutBuilder.php
@@ -0,0 +1,148 @@
+<?php
+
+namespace Drupal\Core\Entity\Display;
+
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Entity\EntityFieldManagerInterface;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Layout\LayoutPluginManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Builds a field layout.
+ */
+class FieldLayoutBuilder implements ContainerInjectionInterface {
+
+  /**
+   * The layout plugin manager.
+   *
+   * @var \Drupal\Core\Layout\LayoutPluginManagerInterface
+   */
+  protected $layoutPluginManager;
+
+  /**
+   * The entity field manager.
+   *
+   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
+   */
+  protected $entityFieldManager;
+
+  /**
+   * Constructs a new FieldLayoutBuilder.
+   *
+   * @param \Drupal\Core\Layout\LayoutPluginManagerInterface $layout_plugin_manager
+   *   The layout plugin manager.
+   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
+   *   The entity field manager.
+   */
+  public function __construct(LayoutPluginManagerInterface $layout_plugin_manager, EntityFieldManagerInterface $entity_field_manager) {
+    $this->layoutPluginManager = $layout_plugin_manager;
+    $this->entityFieldManager = $entity_field_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('plugin.manager.core.layout'),
+      $container->get('entity_field.manager')
+    );
+  }
+
+  /**
+   * Applies the layout to an entity build.
+   *
+   * @param array $build
+   *   A renderable array representing the entity content or form.
+   * @param \Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface $display
+   *   The entity display holding the display options configured for the entity
+   *   components.
+   */
+  public function buildView(array &$build, EntityDisplayWithLayoutInterface $display) {
+    $layout_definition = $this->layoutPluginManager->getDefinition($display->getLayoutId(), FALSE);
+    if ($layout_definition && $fields = $this->getFields($build, $display, 'view')) {
+      // Add the regions to the $build in the correct order.
+      $regions = array_fill_keys($layout_definition->getRegionNames(), []);
+
+      foreach ($fields as $name => $field) {
+        // Move the field from the top-level of $build into a region-specific
+        // section.
+        // @todo Ideally the array structure would remain unchanged, see
+        //   https://www.drupal.org/node/2846393.
+        $regions[$field['region']][$name] = $build[$name];
+        unset($build[$name]);
+      }
+      $build['layout'] = $display->getLayout()->build($regions);
+    }
+  }
+
+  /**
+   * Applies the layout to an entity form.
+   *
+   * @param array $build
+   *   A renderable array representing the entity content or form.
+   * @param \Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface $display
+   *   The entity display holding the display options configured for the entity
+   *   components.
+   */
+  public function buildForm(array &$build, EntityDisplayWithLayoutInterface $display) {
+    $layout_definition = $this->layoutPluginManager->getDefinition($display->getLayoutId(), FALSE);
+    if ($layout_definition && $fields = $this->getFields($build, $display, 'form')) {
+      $fill = [];
+      $fill['#process'][] = '\Drupal\Core\Render\Element\RenderElement::processGroup';
+      $fill['#pre_render'][] = '\Drupal\Core\Render\Element\RenderElement::preRenderGroup';
+      // Add the regions to the $build in the correct order.
+      $regions = array_fill_keys($layout_definition->getRegionNames(), $fill);
+
+      foreach ($fields as $name => $field) {
+        // As this is a form, #group can be used to relocate the fields. This
+        // avoids breaking hook_form_alter() implementations by not actually
+        // moving the field in the form structure. If a #group is already set,
+        // do not overwrite it.
+        if (!isset($build[$name]['#group'])) {
+          $build[$name]['#group'] = $field['region'];
+        }
+      }
+      $build['layout'] = $display->getLayout()->build($regions);
+    }
+  }
+
+  /**
+   * Gets the fields that need to be processed.
+   *
+   * @param array $build
+   *   A renderable array representing the entity content or form.
+   * @param \Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface $display
+   *   The entity display holding the display options configured for the entity
+   *   components.
+   * @param string $display_context
+   *   The display context, either 'form' or 'view'.
+   *
+   * @return array
+   *   An array of configurable fields present in the build.
+   */
+  protected function getFields(array $build, EntityDisplayWithLayoutInterface $display, $display_context) {
+    $components = $display->getComponents();
+
+    // Ignore any extra fields from the list of field definitions. Field
+    // definitions can have a non-configurable display, but all extra fields are
+    // always displayed.
+    $field_definitions = array_diff_key(
+      $this->entityFieldManager->getFieldDefinitions($display->getTargetEntityTypeId(), $display->getTargetBundle()),
+      $this->entityFieldManager->getExtraFields($display->getTargetEntityTypeId(), $display->getTargetBundle())
+    );
+
+    $fields_to_exclude = array_filter($field_definitions, function (FieldDefinitionInterface $field_definition) use ($display_context) {
+      // Remove fields with a non-configurable display.
+      return !$field_definition->isDisplayConfigurable($display_context);
+    });
+    $components = array_diff_key($components, $fields_to_exclude);
+
+    // Only include fields present in the build.
+    $components = array_intersect_key($components, $build);
+
+    return $components;
+  }
+
+}
diff --git a/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php b/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
index cd90ecc..b9f4daf 100644
--- a/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
+++ b/core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php
@@ -30,6 +30,8 @@
  *     "mode",
  *     "content",
  *     "hidden",
+ *     "layout_id",
+ *     "layout_settings",
  *   }
  * )
  */
diff --git a/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php b/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
index a6b83cf..13f16fe 100644
--- a/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
+++ b/core/lib/Drupal/Core/Entity/Entity/EntityViewDisplay.php
@@ -28,6 +28,8 @@
  *     "mode",
  *     "content",
  *     "hidden",
+ *     "layout_id",
+ *     "layout_settings",
  *   }
  * )
  */
diff --git a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
index b6c73e5..3a719a1 100644
--- a/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
+++ b/core/lib/Drupal/Core/Entity/EntityDisplayBase.php
@@ -4,13 +4,15 @@
 
 use Drupal\Core\Config\Entity\ConfigEntityBase;
 use Drupal\Core\Config\Entity\ConfigEntityInterface;
+use Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface;
 use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Entity\Display\EntityDisplayInterface;
+use Drupal\Core\Layout\LayoutInterface;
 
 /**
  * Provides a common base class for entity view and form displays.
  */
-abstract class EntityDisplayBase extends ConfigEntityBase implements EntityDisplayInterface {
+abstract class EntityDisplayBase extends ConfigEntityBase implements EntityDisplayInterface, EntityDisplayWithLayoutInterface {
 
   /**
    * The 'mode' for runtime EntityDisplay objects used to render entities with
@@ -79,6 +81,20 @@
   protected $hidden = array();
 
   /**
+   * The layout ID.
+   *
+   * @var string
+   */
+  protected $layout_id = 'layout_onecol';
+
+  /**
+   * The layout settings.
+   *
+   * @var array
+   */
+  protected $layout_settings = [];
+
+  /**
    * The original view or form mode that was requested (case of view/form modes
    * being configured to fall back to the 'default' display).
    *
@@ -264,6 +280,15 @@ public function preSave(EntityStorageInterface $storage, $update = TRUE) {
     ksort($this->content);
     ksort($this->hidden);
     parent::preSave($storage, $update);
+
+    // @fixme
+    // Ensure the plugin configuration is updated. Once layouts are no longer
+    // stored as third party settings, this will be handled by the code in
+    // \Drupal\Core\Config\Entity\ConfigEntityBase::preSave() that handles
+    // \Drupal\Core\Entity\EntityWithPluginCollectionInterface.
+    if ($this->getLayoutId()) {
+      $this->setLayout($this->getLayout());
+    }
   }
 
   /**
@@ -313,6 +338,24 @@ public function calculateDependencies() {
       $mode_entity = $this->entityManager()->getStorage('entity_' . $this->displayContext . '_mode')->load($target_entity_type->id() . '.' . $this->mode);
       $this->addDependency('config', $mode_entity->getConfigDependencyName());
     }
+
+    // @todo Remove once https://www.drupal.org/node/2821191 is resolved.
+    // This can be called during uninstallation, so check for a valid ID first.
+    if ($this->getLayoutId()) {
+      /** @var \Drupal\Core\Layout\LayoutInterface $layout */
+      $layout = $this->getLayout();
+      $definition = $layout->getPluginDefinition();
+
+      if (!in_array($definition->getProvider(), ['core', 'component'])) {
+        $this->addDependency('module', $definition->getProvider());
+      }
+      if ($config_dependencies = $definition->getConfigDependencies()) {
+        $this->addDependencies($config_dependencies);
+      }
+      if ($layout_dependencies = $layout->calculateDependencies()) {
+        $this->addDependencies($layout_dependencies);
+      }
+    }
     return $this;
   }
 
@@ -550,8 +593,93 @@ protected function getPluginRemovedDependencies(array $plugin_dependencies, arra
    * @return string
    *   The default region for this display.
    */
-  protected function getDefaultRegion() {
-    return 'content';
+  public function getDefaultRegion() {
+    return $this->getLayoutDefinition($this->getLayoutId())->getDefaultRegion();
+  }
+
+  /**
+   * Gets a layout definition.
+   *
+   * @param string $layout_id
+   *   The layout ID.
+   *
+   * @return \Drupal\Core\Layout\LayoutDefinition
+   *   The layout definition.
+   */
+  protected function getLayoutDefinition($layout_id) {
+    return \Drupal::service('plugin.manager.core.layout')->getDefinition($layout_id);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLayoutId() {
+    return $this->layout_id;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLayoutSettings() {
+    return $this->layout_settings;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setLayoutId($layout_id, array $layout_settings = []) {
+    if ($this->getLayoutId() !== $layout_id) {
+      // @todo Devise a mechanism for mapping old regions to new ones in
+      //   https://www.drupal.org/node/2796877.
+      $layout_definition = $this->getLayoutDefinition($layout_id);
+      $new_region = $layout_definition->getDefaultRegion();
+      $layout_regions = $layout_definition->getRegions();
+      foreach ($this->getComponents() as $name => $component) {
+        if (isset($component['region']) && !isset($layout_regions[$component['region']])) {
+          $component['region'] = $new_region;
+          $this->setComponent($name, $component);
+        }
+      }
+    }
+    $this->layout_id = $layout_id;
+    // Instantiate the plugin and consult it for the updated plugin
+    // configuration. Once layouts are no longer stored as third party settings,
+    // this will be handled by the code in
+    // \Drupal\Core\Config\Entity\ConfigEntityBase::set() that handles
+    // \Drupal\Core\Entity\EntityWithPluginCollectionInterface.
+    $layout_settings = $this->doGetLayout($layout_id, $layout_settings)->getConfiguration();
+    $this->layout_settings = $layout_settings;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setLayout(LayoutInterface $layout) {
+    $this->setLayoutId($layout->getPluginId(), $layout->getConfiguration());
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLayout() {
+    return $this->doGetLayout($this->getLayoutId(), $this->getLayoutSettings());
+  }
+
+  /**
+   * Gets the layout plugin.
+   *
+   * @param string $layout_id
+   *   A layout plugin ID.
+   * @param array $layout_settings
+   *   An array of settings.
+   *
+   * @return \Drupal\Core\Layout\LayoutInterface
+   *   The layout plugin.
+   */
+  protected function doGetLayout($layout_id, array $layout_settings) {
+    return \Drupal::service('plugin.manager.core.layout')->createInstance($layout_id, $layout_settings);
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Layout/Annotation/Layout.php b/core/lib/Drupal/Core/Layout/Annotation/Layout.php
index 1cb5ff0..4f30834 100644
--- a/core/lib/Drupal/Core/Layout/Annotation/Layout.php
+++ b/core/lib/Drupal/Core/Layout/Annotation/Layout.php
@@ -72,9 +72,9 @@ class Layout extends Plugin {
   /**
    * The template file to render this layout (relative to the 'path' given).
    *
-   * If specified, then the layout_discovery module will register the template
-   * with hook_theme() and the module or theme registering this layout does not
-   * need to do it.
+   * If specified, then the system module will register the template with
+   * hook_theme() and the module or theme registering this layout does not need
+   * to do it.
    *
    * @var string optional
    *
diff --git a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.default.yml b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.default.yml
index e0232cf..9c94288 100644
--- a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.default.yml
+++ b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.default.yml
@@ -36,3 +36,5 @@ content:
     label: inline
 hidden:
   more_link: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.summary.yml b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.summary.yml
index 5e5e468..6767ecf 100644
--- a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.summary.yml
+++ b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_feed.aggregator_feed.summary.yml
@@ -22,3 +22,5 @@ hidden:
   feed_icon: true
   image: true
   link: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_item.aggregator_item.summary.yml b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_item.aggregator_item.summary.yml
index 8e29395..2c49c11 100644
--- a/core/modules/aggregator/config/install/core.entity_view_display.aggregator_item.aggregator_item.summary.yml
+++ b/core/modules/aggregator/config/install/core.entity_view_display.aggregator_item.aggregator_item.summary.yml
@@ -18,3 +18,5 @@ hidden:
   description: true
   feed: true
   link: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/book/config/optional/core.entity_form_display.node.book.default.yml b/core/modules/book/config/optional/core.entity_form_display.node.book.default.yml
index 58aba45..9311e06 100644
--- a/core/modules/book/config/optional/core.entity_form_display.node.book.default.yml
+++ b/core/modules/book/config/optional/core.entity_form_display.node.book.default.yml
@@ -58,3 +58,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/book/config/optional/core.entity_view_display.node.book.default.yml b/core/modules/book/config/optional/core.entity_view_display.node.book.default.yml
index d6ef64d..f4528f5 100644
--- a/core/modules/book/config/optional/core.entity_view_display.node.book.default.yml
+++ b/core/modules/book/config/optional/core.entity_view_display.node.book.default.yml
@@ -23,3 +23,5 @@ content:
     weight: 101
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/book/config/optional/core.entity_view_display.node.book.teaser.yml b/core/modules/book/config/optional/core.entity_view_display.node.book.teaser.yml
index 77a62c3..9000525 100644
--- a/core/modules/book/config/optional/core.entity_view_display.node.book.teaser.yml
+++ b/core/modules/book/config/optional/core.entity_view_display.node.book.teaser.yml
@@ -25,3 +25,5 @@ content:
     weight: 101
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/field_ui/src/Form/EntityDisplayFormBase.php b/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
index 8908f65..faf0872 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayFormBase.php
@@ -11,7 +11,11 @@
 use Drupal\Core\Field\FieldTypePluginManagerInterface;
 use Drupal\Core\Field\PluginSettingsInterface;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Form\SubformState;
+use Drupal\Core\Layout\LayoutPluginManagerInterface;
+use Drupal\Core\Plugin\PluginFormInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface;
 use Drupal\field_ui\Element\FieldUiTable;
 use Drupal\field_ui\FieldUI;
 
@@ -35,6 +39,13 @@
   protected $pluginManager;
 
   /**
+   * The field layout plugin manager.
+   *
+   * @var \Drupal\Core\Layout\LayoutPluginManagerInterface
+   */
+  protected $layoutPluginManager;
+
+  /**
    * A list of field types.
    *
    * @var array
@@ -55,10 +66,13 @@
    *   The field type manager.
    * @param \Drupal\Component\Plugin\PluginManagerBase $plugin_manager
    *   The widget or formatter plugin manager.
+   * @param \Drupal\Core\Layout\LayoutPluginManagerInterface $layout_plugin_manager
+   *   The layout plugin manager.
    */
-  public function __construct(FieldTypePluginManagerInterface $field_type_manager, PluginManagerBase $plugin_manager) {
+  public function __construct(FieldTypePluginManagerInterface $field_type_manager, PluginManagerBase $plugin_manager, LayoutPluginManagerInterface $layout_plugin_manager) {
     $this->fieldTypes = $field_type_manager->getDefinitions();
     $this->pluginManager = $plugin_manager;
+    $this->layoutPluginManager = $layout_plugin_manager;
   }
 
   /**
@@ -90,17 +104,22 @@ public function getEntityFromRouteMatch(RouteMatchInterface $route_match, $entit
    *   @endcode
    */
   public function getRegions() {
-    return array(
-      'content' => array(
-        'title' => $this->t('Content'),
-        'invisible' => TRUE,
-        'message' => $this->t('No field is displayed.')
-      ),
-      'hidden' => array(
-        'title' => $this->t('Disabled', array(), array('context' => 'Plural')),
-        'message' => $this->t('No field is hidden.')
-      ),
-    );
+    $regions = [];
+
+    $layout_definition = $this->layoutPluginManager->getDefinition($this->getEntity()->getLayoutId());
+    foreach ($layout_definition->getRegions() as $name => $region) {
+      $regions[$name] = [
+        'title' => $region['label'],
+        'message' => $this->t('No field is displayed.'),
+      ];
+    }
+
+    $regions['hidden'] = [
+      'title' => $this->t('Disabled', [], ['context' => 'Plural']),
+      'message' => $this->t('No field is hidden.'),
+    ];
+
+    return $regions;
   }
 
   /**
@@ -244,6 +263,48 @@ public function form(array $form, FormStateInterface $form_state) {
       '#attributes' => array('class' => array('visually-hidden'))
     );
 
+    $form['layouts'] = [
+      '#type' => 'details',
+      '#title' => $this->t('Layout settings'),
+    ];
+
+    $layout_plugin = $this->getLayout($this->getEntity(), $form_state);
+
+    $form['layouts']['layout'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Select a layout'),
+      '#options' => $this->layoutPluginManager->getLayoutOptions(),
+      '#default_value' => $layout_plugin->getPluginId(),
+      '#ajax' => [
+        'callback' => '::settingsAjax',
+        'wrapper' => 'field-layout-settings-wrapper',
+        'trigger_as' => ['name' => 'layout_change'],
+      ],
+    ];
+    $form['layouts']['submit'] = [
+      '#type' => 'submit',
+      '#name' => 'layout_change',
+      '#value' => $this->t('Change layout'),
+      '#submit' => ['::settingsAjaxSubmit'],
+      '#attributes' => ['class' => ['js-hide']],
+      '#ajax' => [
+        'callback' => '::settingsAjax',
+        'wrapper' => 'field-layout-settings-wrapper',
+      ],
+    ];
+
+    $form['layouts']['settings_wrapper'] = [
+      '#type' => 'container',
+      '#id' => 'field-layout-settings-wrapper',
+      '#tree' => TRUE,
+    ];
+
+    if ($layout_plugin instanceof PluginFormInterface) {
+      $form['layouts']['settings_wrapper']['layout_settings'] = [];
+      $subform_state = SubformState::createForSubform($form['layouts']['settings_wrapper']['layout_settings'], $form, $form_state);
+      $form['layouts']['settings_wrapper']['layout_settings'] = $layout_plugin->buildConfigurationForm($form['layouts']['settings_wrapper']['layout_settings'], $subform_state);
+    }
+
     $form['actions'] = array('#type' => 'actions');
     $form['actions']['submit'] = array(
       '#type' => 'submit',
@@ -508,6 +569,19 @@ protected function buildExtraFieldRow($field_id, $extra_field) {
   /**
    * {@inheritdoc}
    */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+    parent::validateForm($form, $form_state);
+
+    $layout_plugin = $this->getLayout($this->getEntity(), $form_state);
+    if ($layout_plugin instanceof PluginFormInterface) {
+      $subform_state = SubformState::createForSubform($form['layouts']['settings_wrapper']['layout_settings'], $form, $form_state);
+      $layout_plugin->validateConfigurationForm($form['layouts']['settings_wrapper']['layout_settings'], $subform_state);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     // If the main "Save" button was submitted while a field settings subform
     // was being edited, update the new incoming settings when rebuilding the
@@ -517,6 +591,16 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
     }
 
     parent::submitForm($form, $form_state);
+
+    $entity = $this->getEntity();
+    $layout_plugin = $this->getLayout($entity, $form_state);
+    if ($layout_plugin instanceof PluginFormInterface) {
+      $subform_state = SubformState::createForSubform($form['layouts']['settings_wrapper']['layout_settings'], $form, $form_state);
+      $layout_plugin->submitConfigurationForm($form['layouts']['settings_wrapper']['layout_settings'], $subform_state);
+    }
+
+    $entity->setLayout($layout_plugin);
+
     $form_values = $form_state->getValues();
 
     // Handle the 'display modes' checkboxes if present.
@@ -684,6 +768,47 @@ public function multistepAjax($form, FormStateInterface $form_state) {
   }
 
   /**
+   * Gets the layout plugin for the currently selected field layout.
+   *
+   * @param \Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface $entity
+   *   The current form entity.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   *
+   * @return \Drupal\Core\Layout\LayoutInterface
+   *   The layout plugin.
+   */
+  protected function getLayout(EntityDisplayWithLayoutInterface $entity, FormStateInterface $form_state) {
+    if (!$layout_plugin = $form_state->get('layout_plugin')) {
+      $stored_layout_id = $entity->getLayoutId();
+      // Use selected layout if it exists, falling back to the stored layout.
+      $layout_id = $form_state->getValue('layout', $stored_layout_id);
+      // If the current layout is the stored layout, use the stored layout
+      // settings. Otherwise leave the settings empty.
+      $layout_settings = $layout_id === $stored_layout_id ? $entity->getLayoutSettings() : [];
+
+      $layout_plugin = $this->layoutPluginManager->createInstance($layout_id, $layout_settings);
+      $form_state->set('layout_plugin', $layout_plugin);
+    }
+    return $layout_plugin;
+  }
+
+  /**
+   * Ajax callback for the field layout settings form.
+   */
+  public static function settingsAjax($form, FormStateInterface $form_state) {
+    return $form['layouts']['settings_wrapper'];
+  }
+
+  /**
+   * Submit handler for the non-JS case.
+   */
+  public function settingsAjaxSubmit($form, FormStateInterface $form_state) {
+    $form_state->set('layout_plugin', NULL);
+    $form_state->setRebuild();
+  }
+
+  /**
    * Performs pre-render tasks on field_ui_table elements.
    *
    * @param array $elements
diff --git a/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php b/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
index af8e2ed..59520a7 100644
--- a/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
+++ b/core/modules/field_ui/src/Form/EntityFormDisplayEditForm.php
@@ -25,7 +25,8 @@ class EntityFormDisplayEditForm extends EntityDisplayFormBase {
   public static function create(ContainerInterface $container) {
     return new static(
       $container->get('plugin.manager.field.field_type'),
-      $container->get('plugin.manager.field.widget')
+      $container->get('plugin.manager.field.widget'),
+      $container->get('plugin.manager.core.layout')
     );
   }
 
diff --git a/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php b/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
index 174726f..066cdf8 100644
--- a/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
+++ b/core/modules/field_ui/src/Form/EntityViewDisplayEditForm.php
@@ -25,7 +25,8 @@ class EntityViewDisplayEditForm extends EntityDisplayFormBase {
   public static function create(ContainerInterface $container) {
     return new static(
       $container->get('plugin.manager.field.field_type'),
-      $container->get('plugin.manager.field.formatter')
+      $container->get('plugin.manager.field.formatter'),
+      $container->get('plugin.manager.core.layout')
     );
   }
 
diff --git a/core/modules/field_ui/tests/src/Functional/EntityDisplayTest.php b/core/modules/field_ui/tests/src/Functional/EntityDisplayTest.php
index c9cfc05..921c699 100644
--- a/core/modules/field_ui/tests/src/Functional/EntityDisplayTest.php
+++ b/core/modules/field_ui/tests/src/Functional/EntityDisplayTest.php
@@ -14,7 +14,7 @@ class EntityDisplayTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['field_ui', 'entity_test'];
+  public static $modules = ['field_ui', 'entity_test', 'node'];
 
   /**
    * {@inheritdoc}
@@ -25,6 +25,26 @@ protected function setUp() {
     $this->drupalLogin($this->drupalCreateUser([
       'administer entity_test display',
     ]));
+
+    $this->createContentType([
+      'type' => 'article',
+    ]);
+    $this->createNode([
+      'type' => 'article',
+      'title' => 'The node title',
+      'body' => [[
+        'value' => 'The node body',
+      ]],
+    ]);
+    $this->drupalLogin($this->drupalCreateUser([
+      'access administration pages',
+      'administer content types',
+      'administer nodes',
+      'administer node fields',
+      'administer node display',
+      'administer node form display',
+      'view the administration theme',
+    ]));
   }
 
   /**
@@ -43,4 +63,34 @@ public function testEntityView() {
     $this->assertTrue($this->assertSession()->optionExists('fields[field_test_text][region]', 'content')->isSelected());
   }
 
+  /**
+   * Tests an entity type that has fields shown by default.
+   */
+  public function testNodeView() {
+    // By default, the one-column layout is used.
+    $this->drupalGet('node/1');
+    $this->assertSession()->elementExists('css', '.layout--onecol');
+    $this->assertSession()->elementExists('css', '.layout-region--content .field--name-body');
+
+    $this->drupalGet('admin/structure/types/manage/article/display');
+    $this->assertEquals(['Content', 'Disabled'], $this->getRegionTitles());
+    $this->assertSession()->optionExists('fields[body][region]', 'content');
+  }
+
+  /**
+   * Gets the region titles on the page.
+   *
+   * @return string[]
+   *   An array of region titles.
+   */
+  protected function getRegionTitles() {
+    $region_titles = [];
+    $region_title_elements = $this->getSession()->getPage()->findAll('css', '.region-title td');
+    /** @var \Behat\Mink\Element\NodeElement[] $region_title_elements */
+    foreach ($region_title_elements as $region_title_element) {
+      $region_titles[] = $region_title_element->getText();
+    }
+    return $region_titles;
+  }
+
 }
diff --git a/core/modules/field_ui/tests/src/FunctionalJavascript/EntityDisplayTest.php b/core/modules/field_ui/tests/src/FunctionalJavascript/EntityDisplayTest.php
index 319e8df..9e1a5a8 100644
--- a/core/modules/field_ui/tests/src/FunctionalJavascript/EntityDisplayTest.php
+++ b/core/modules/field_ui/tests/src/FunctionalJavascript/EntityDisplayTest.php
@@ -15,7 +15,7 @@ class EntityDisplayTest extends JavascriptTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['field_ui', 'entity_test'];
+  public static $modules = ['field_ui', 'entity_test', 'field_layout_test', 'layout_test'];
 
   /**
    * {@inheritdoc}
@@ -86,4 +86,226 @@ public function testEntityView() {
     $this->assertSession()->elementExists('css', '.field--name-field-test-text');
   }
 
+  /**
+   * Tests that layouts are unique per view mode.
+   */
+  public function testEntityViewModes() {
+    // By default, the field is not visible.
+    $this->drupalGet('entity_test/1/test');
+    $this->assertSession()->elementNotExists('css', '.layout-region--content .field--name-field-test-text');
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->elementNotExists('css', '.layout-region--content .field--name-field-test-text');
+
+    // Change the layout for the "test" view mode. See
+    // core.entity_view_mode.entity_test.test.yml.
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    $this->click('#edit-modes');
+    $this->getSession()->getPage()->checkField('display_modes_custom[test]');
+    $this->submitForm([], 'Save');
+    $this->clickLink('configure them');
+    $this->getSession()->getPage()->pressButton('Show row weights');
+    $this->getSession()->getPage()->selectFieldOption('fields[field_test_text][region]', 'content');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+
+    // Each view mode has a different layout.
+    $this->drupalGet('entity_test/1/test');
+    $this->assertSession()->elementExists('css', '.layout-region--content .field--name-field-test-text');
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->elementNotExists('css', '.layout-region--content .field--name-field-test-text');
+  }
+
+  /**
+   * Tests the use of field layout for entity form displays.
+   */
+  public function testLayoutEntityForm() {
+    // By default, the one-column layout is used.
+    $this->drupalGet('entity_test/manage/1/edit');
+    $this->assertFieldInRegion('field_test_text[0][value]', 'content');
+
+    // The one-column layout is in use.
+    $this->drupalGet('entity_test/structure/entity_test/form-display');
+    $this->assertEquals(['Content', 'Disabled'], $this->getRegionTitles());
+
+    // Switch the layout to two columns.
+    $this->click('#edit-field-layouts');
+    $this->getSession()->getPage()->selectFieldOption('layout', 'layout_twocol');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+
+    // The field is moved to the default region for the new layout.
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+    $this->assertEquals(['Left', 'Right', 'Disabled'], $this->getRegionTitles());
+
+    $this->drupalGet('entity_test/manage/1/edit');
+    // No fields are visible, and the regions don't display when empty.
+    $this->assertFieldInRegion('field_test_text[0][value]', 'left');
+    $this->assertSession()->elementExists('css', '.layout-region--left .field--name-field-test-text');
+
+    // After a refresh the new regions are still there.
+    $this->drupalGet('entity_test/structure/entity_test/form-display');
+    $this->assertEquals(['Left', 'Right', 'Disabled'], $this->getRegionTitles());
+
+    // Drag the field to the right region.
+    $field_test_text_row = $this->getSession()->getPage()->find('css', '#field-test-text');
+    $right_region_row = $this->getSession()->getPage()->find('css', '.region-right-message');
+    $field_test_text_row->find('css', '.handle')->dragTo($right_region_row);
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+
+    // The new layout is used.
+    $this->drupalGet('entity_test/manage/1/edit');
+    $this->assertSession()->elementExists('css', '.layout-region--right .field--name-field-test-text');
+    $this->assertFieldInRegion('field_test_text[0][value]', 'right');
+
+    // Move the field to the right region without tabledrag.
+    $this->drupalGet('entity_test/structure/entity_test/form-display');
+    $this->getSession()->getPage()->pressButton('Show row weights');
+    $this->getSession()->getPage()->selectFieldOption('fields[field_test_text][region]', 'right');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+
+    // The updated region is used.
+    $this->drupalGet('entity_test/manage/1/edit');
+    $this->assertFieldInRegion('field_test_text[0][value]', 'right');
+
+    // The layout is still in use without Field UI.
+    $this->container->get('module_installer')->uninstall(['field_ui']);
+    $this->drupalGet('entity_test/manage/1/edit');
+    $this->assertFieldInRegion('field_test_text[0][value]', 'right');
+  }
+
+  /**
+   * Tests the use of field layout for entity view displays.
+   */
+  public function testLayoutEntityView() {
+    // The one-column layout is in use.
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    $this->assertEquals(['Content', 'Disabled'], $this->getRegionTitles());
+
+    // Switch the layout to two columns.
+    $this->click('#edit-field-layouts');
+    $this->getSession()->getPage()->selectFieldOption('layout', 'layout_twocol');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+    $this->assertEquals(['Left', 'Right', 'Disabled'], $this->getRegionTitles());
+
+    $this->drupalGet('entity_test/1');
+    // No fields are visible, and the regions don't display when empty.
+    $this->assertSession()->elementNotExists('css', '.layout--twocol');
+    $this->assertSession()->elementNotExists('css', '.layout-region');
+    $this->assertSession()->elementNotExists('css', '.field--name-field-test-text');
+
+    // After a refresh the new regions are still there.
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    $this->assertEquals(['Left', 'Right', 'Disabled'], $this->getRegionTitles());
+
+    // Drag the field to the left region.
+    $this->assertTrue($this->assertSession()->optionExists('fields[field_test_text][region]', 'hidden')->isSelected());
+    $field_test_text_row = $this->getSession()->getPage()->find('css', '#field-test-text');
+    $left_region_row = $this->getSession()->getPage()->find('css', '.region-left-message');
+    $field_test_text_row->find('css', '.handle')->dragTo($left_region_row);
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->assertFalse($this->assertSession()->optionExists('fields[field_test_text][region]', 'hidden')->isSelected());
+    $this->submitForm([], 'Save');
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+
+    // The new layout is used.
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->elementExists('css', '.layout--twocol');
+    $this->assertSession()->elementExists('css', '.layout-region--left .field--name-field-test-text');
+
+    // Move the field to the right region without tabledrag.
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    $this->getSession()->getPage()->pressButton('Show row weights');
+    $this->getSession()->getPage()->selectFieldOption('fields[field_test_text][region]', 'right');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+
+    // The updated region is used.
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->elementExists('css', '.layout-region--right .field--name-field-test-text');
+
+    // The layout is still in use without Field UI.
+    $this->container->get('module_installer')->uninstall(['field_ui']);
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->elementExists('css', '.layout--twocol');
+    $this->assertSession()->elementExists('css', '.layout-region--right .field--name-field-test-text');
+  }
+
+  /**
+   * Tests layout plugins with forms.
+   */
+  public function testLayoutForms() {
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    // Switch to a field layout with settings.
+    $this->click('#edit-field-layouts');
+
+    // Test switching between layouts with and without forms.
+    $this->getSession()->getPage()->selectFieldOption('layout', 'layout_test_plugin');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->assertSession()->fieldExists('settings_wrapper[layout_settings][setting_1]');
+
+    $this->getSession()->getPage()->selectFieldOption('layout', 'layout_test_2col');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->assertSession()->fieldNotExists('settings_wrapper[layout_settings][setting_1]');
+
+    $this->getSession()->getPage()->selectFieldOption('layout', 'layout_test_plugin');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->assertSession()->fieldExists('settings_wrapper[layout_settings][setting_1]');
+
+    // Move the test field to the content region.
+    $this->getSession()->getPage()->pressButton('Show row weights');
+    $this->getSession()->getPage()->selectFieldOption('fields[field_test_text][region]', 'content');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $this->submitForm([], 'Save');
+
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->pageTextContains('Blah: Default');
+
+    // Update the field layout settings.
+    $this->drupalGet('entity_test/structure/entity_test/display');
+    $this->click('#edit-field-layouts');
+    $this->getSession()->getPage()->fillField('settings_wrapper[layout_settings][setting_1]', 'Test text');
+    $this->submitForm([], 'Save');
+
+    $this->drupalGet('entity_test/1');
+    $this->assertSession()->pageTextContains('Blah: Test text');
+  }
+
+  /**
+   * Gets the region titles on the page.
+   *
+   * @return string[]
+   *   An array of region titles.
+   */
+  protected function getRegionTitles() {
+    $region_titles = [];
+    $region_title_elements = $this->getSession()->getPage()->findAll('css', '.region-title td');
+    /** @var \Behat\Mink\Element\NodeElement[] $region_title_elements */
+    foreach ($region_title_elements as $region_title_element) {
+      $region_titles[] = $region_title_element->getText();
+    }
+    return $region_titles;
+  }
+
+  /**
+   * Asserts that a field exists in a given region.
+   *
+   * @param string $field_selector
+   *   The field selector, one of field id|name|label|value.
+   * @param string $region_name
+   *   The machine name of the region.
+   */
+  protected function assertFieldInRegion($field_selector, $region_name) {
+    $region_element = $this->getSession()->getPage()->find('css', ".layout-region--$region_name");
+    $this->assertNotNull($region_element);
+    $this->assertSession()->fieldExists($field_selector, $region_element);
+  }
+
 }
diff --git a/core/modules/forum/config/optional/core.entity_form_display.comment.comment_forum.default.yml b/core/modules/forum/config/optional/core.entity_form_display.comment.comment_forum.default.yml
index 4738bbb..a18fc89 100644
--- a/core/modules/forum/config/optional/core.entity_form_display.comment.comment_forum.default.yml
+++ b/core/modules/forum/config/optional/core.entity_form_display.comment.comment_forum.default.yml
@@ -31,3 +31,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_form_display.node.forum.default.yml b/core/modules/forum/config/optional/core.entity_form_display.node.forum.default.yml
index 6773d32..91ae40a 100644
--- a/core/modules/forum/config/optional/core.entity_form_display.node.forum.default.yml
+++ b/core/modules/forum/config/optional/core.entity_form_display.node.forum.default.yml
@@ -73,3 +73,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_form_display.taxonomy_term.forums.default.yml b/core/modules/forum/config/optional/core.entity_form_display.taxonomy_term.forums.default.yml
index 50df98a..77d658e 100644
--- a/core/modules/forum/config/optional/core.entity_form_display.taxonomy_term.forums.default.yml
+++ b/core/modules/forum/config/optional/core.entity_form_display.taxonomy_term.forums.default.yml
@@ -27,3 +27,5 @@ content:
     third_party_settings: {  }
 hidden:
   forum_container: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_view_display.comment.comment_forum.default.yml b/core/modules/forum/config/optional/core.entity_view_display.comment.comment_forum.default.yml
index befeba8..d112cf1 100644
--- a/core/modules/forum/config/optional/core.entity_view_display.comment.comment_forum.default.yml
+++ b/core/modules/forum/config/optional/core.entity_view_display.comment.comment_forum.default.yml
@@ -22,3 +22,5 @@ content:
     weight: 100
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_view_display.node.forum.default.yml b/core/modules/forum/config/optional/core.entity_view_display.node.forum.default.yml
index f3e8c5c..6967140 100644
--- a/core/modules/forum/config/optional/core.entity_view_display.node.forum.default.yml
+++ b/core/modules/forum/config/optional/core.entity_view_display.node.forum.default.yml
@@ -44,3 +44,5 @@ content:
       link: true
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_view_display.node.forum.teaser.yml b/core/modules/forum/config/optional/core.entity_view_display.node.forum.teaser.yml
index 7b174f4..21bce8c 100644
--- a/core/modules/forum/config/optional/core.entity_view_display.node.forum.teaser.yml
+++ b/core/modules/forum/config/optional/core.entity_view_display.node.forum.teaser.yml
@@ -36,3 +36,5 @@ content:
     third_party_settings: {  }
 hidden:
   comment_forum: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/forum/config/optional/core.entity_view_display.taxonomy_term.forums.default.yml b/core/modules/forum/config/optional/core.entity_view_display.taxonomy_term.forums.default.yml
index b326039..eceec30 100644
--- a/core/modules/forum/config/optional/core.entity_view_display.taxonomy_term.forums.default.yml
+++ b/core/modules/forum/config/optional/core.entity_view_display.taxonomy_term.forums.default.yml
@@ -20,3 +20,5 @@ content:
     label: above
 hidden:
   forum_container: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/layout_discovery/layout_discovery.info.yml b/core/modules/layout_discovery/layout_discovery.info.yml
deleted file mode 100644
index a9a4139..0000000
--- a/core/modules/layout_discovery/layout_discovery.info.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-name: 'Layout Discovery'
-type: module
-description: 'Provides a way for modules or themes to register layouts.'
-package: Core (Experimental)
-version: VERSION
-core: 8.x
diff --git a/core/modules/layout_discovery/layout_discovery.install b/core/modules/layout_discovery/layout_discovery.install
deleted file mode 100644
index e6c99e0..0000000
--- a/core/modules/layout_discovery/layout_discovery.install
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-/**
- * @file
- * Install, update, and uninstall functions for the Layout Discovery module.
- */
-
-/**
- * Implements hook_requirements().
- */
-function layout_discovery_requirements($phase) {
-  $requirements = [];
-  if ($phase === 'install') {
-    if (\Drupal::moduleHandler()->moduleExists('layout_plugin')) {
-      $requirements['layout_discovery'] = [
-        'description' => t('Layout Discovery cannot be installed because the Layout Plugin module is installed and incompatible.'),
-        'severity' => REQUIREMENT_ERROR,
-      ];
-    }
-  }
-  return $requirements;
-}
diff --git a/core/modules/layout_discovery/layout_discovery.module b/core/modules/layout_discovery/layout_discovery.module
deleted file mode 100644
index 3cffee9..0000000
--- a/core/modules/layout_discovery/layout_discovery.module
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-/**
- * @file
- * Provides hook implementations for Layout Discovery.
- */
-
-/**
- * Implements hook_help().
- */
-function layout_discovery_help($route_name) {
-  switch ($route_name) {
-    case 'help.page.layout_discovery':
-      $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('Layout Discovery allows modules or themes to register layouts, and for other modules to list the available layouts and render them.') . '</p>';
-      $output .= '<p>' . t('For more information, see the <a href=":layout-discovery-documentation">online documentation for the Layout Discovery module</a>.', [':layout-discovery-documentation' => 'https://www.drupal.org/node/2619128']) . '</p>';
-      return $output;
-  }
-}
-
-/**
- * Implements hook_theme().
- */
-function layout_discovery_theme() {
-  return \Drupal::service('plugin.manager.core.layout')->getThemeImplementations();
-}
-
-/**
- * Prepares variables for layout templates.
- *
- * @param array &$variables
- *   An associative array containing:
- *   - content: An associative array containing the properties of the element.
- *     Properties used: #settings, #layout.
- */
-function template_preprocess_layout(&$variables) {
-  $variables['settings'] = isset($variables['content']['#settings']) ? $variables['content']['#settings'] : [];
-  $variables['layout'] = isset($variables['content']['#layout']) ? $variables['content']['#layout'] : [];
-}
diff --git a/core/modules/layout_discovery/layout_discovery.services.yml b/core/modules/layout_discovery/layout_discovery.services.yml
deleted file mode 100644
index 1e24db4..0000000
--- a/core/modules/layout_discovery/layout_discovery.services.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-services:
-  plugin.manager.core.layout:
-    class: Drupal\Core\Layout\LayoutPluginManager
-    arguments: ['@container.namespaces', '@cache.discovery', '@module_handler', '@theme_handler']
diff --git a/core/modules/options/tests/options_config_install_test/config/install/core.entity_form_display.node.options_install_test.default.yml b/core/modules/options/tests/options_config_install_test/config/install/core.entity_form_display.node.options_install_test.default.yml
index ff5f0ec..3f6a8fc 100644
--- a/core/modules/options/tests/options_config_install_test/config/install/core.entity_form_display.node.options_install_test.default.yml
+++ b/core/modules/options/tests/options_config_install_test/config/install/core.entity_form_display.node.options_install_test.default.yml
@@ -59,3 +59,5 @@ content:
     third_party_settings: {  }
 hidden: {  }
 third_party_settings: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.default.yml b/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.default.yml
index aaea1cb..c218048 100644
--- a/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.default.yml
+++ b/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.default.yml
@@ -25,3 +25,5 @@ content:
 hidden:
   langcode: true
 third_party_settings: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.teaser.yml b/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.teaser.yml
index 6e79af9..782461a 100644
--- a/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.teaser.yml
+++ b/core/modules/options/tests/options_config_install_test/config/install/core.entity_view_display.node.options_install_test.teaser.yml
@@ -27,3 +27,5 @@ content:
 hidden:
   langcode: true
 third_party_settings: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/modules/system/layouts/onecol/layout--onecol.html.twig b/core/modules/system/layouts/onecol/layout--onecol.html.twig
new file mode 100644
index 0000000..69fed03
--- /dev/null
+++ b/core/modules/system/layouts/onecol/layout--onecol.html.twig
@@ -0,0 +1,24 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a one-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+set classes = [
+'layout--onecol',
+]
+%}
+{% if content %}
+<div{{ attributes.addClass(classes) }}>
+  <div class="layout-region layout-region--content">
+    {{ content }}
+  </div>
+</div>
+{% endif %}
diff --git a/core/modules/system/layouts/twocol/layout--twocol.html.twig b/core/modules/system/layouts/twocol/layout--twocol.html.twig
new file mode 100644
index 0000000..8e54d30
--- /dev/null
+++ b/core/modules/system/layouts/twocol/layout--twocol.html.twig
@@ -0,0 +1,28 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a two-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+set classes = [
+'layout--twocol',
+]
+%}
+{% if content %}
+  <div{{ attributes.addClass(classes) }}>
+    <div class="layout-region layout-region--left">
+      {{ content.left }}
+    </div>
+
+    <div class="layout-region layout-region--right">
+      {{ content.right }}
+    </div>
+  </div>
+{% endif %}
diff --git a/core/modules/system/layouts/twocol/twocol.layout.css b/core/modules/system/layouts/twocol/twocol.layout.css
new file mode 100644
index 0000000..78a447d
--- /dev/null
+++ b/core/modules/system/layouts/twocol/twocol.layout.css
@@ -0,0 +1,14 @@
+.layout--twocol {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-between;
+}
+.layout--twocol > .layout-region {
+  flex: 0 1 50%;
+  max-width: 50%;
+}
+
+.layout--twocol > .layout-region--left {
+  max-width: calc(50% - 10px);
+  margin-right: 10px;
+}
diff --git a/core/modules/system/system.layouts.yml b/core/modules/system/system.layouts.yml
new file mode 100644
index 0000000..fcbef29
--- /dev/null
+++ b/core/modules/system/system.layouts.yml
@@ -0,0 +1,21 @@
+layout_onecol:
+  label: 'One column'
+  path: layouts/onecol
+  template: layout--onecol
+  category: 'Columns: 1'
+  default_region: content
+  regions:
+    content:
+      label: Content
+layout_twocol:
+  label: 'Two column'
+  path: layouts/twocol
+  template: layout--twocol
+  library: system/drupal.layout.twocol
+  category: 'Columns: 2'
+  default_region: left
+  regions:
+    left:
+      label: Left
+    right:
+      label: Right
diff --git a/core/modules/system/system.libraries.yml b/core/modules/system/system.libraries.yml
index 206ae4f..6e1362d 100644
--- a/core/modules/system/system.libraries.yml
+++ b/core/modules/system/system.libraries.yml
@@ -77,3 +77,9 @@ drupal.system.date:
     - core/drupalSettings
     - core/jquery.once
     - core/drupal.form
+
+drupal.layout.twocol:
+  version: VERSION
+  css:
+    layout:
+      layouts/twocol/twocol.layout.css: {}
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 6581e60..76c7110 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -9,6 +9,9 @@
 use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\Asset\AttachedAssetsInterface;
 use Drupal\Core\Cache\Cache;
+use Drupal\Core\Entity\ContentEntityFormInterface;
+use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
+use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Queue\QueueGarbageCollectionInterface;
 use Drupal\Core\Database\Query\AlterableInterface;
 use Drupal\Core\Extension\Extension;
@@ -24,6 +27,8 @@
 use Drupal\Core\Extension\ModuleHandler;
 use Drupal\Core\Url;
 use Drupal\Core\Block\BlockPluginInterface;
+use Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface;
+use Drupal\Core\Entity\Display\FieldLayoutBuilder;
 use Drupal\user\UserInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use GuzzleHttp\Exception\RequestException;
@@ -224,7 +229,7 @@ function system_theme() {
       ),
       'template' => 'entity-add-list',
     ),
-  ));
+  ), \Drupal::service('plugin.manager.core.layout')->getThemeImplementations());
 }
 
 /**
@@ -722,9 +727,27 @@ function system_js_settings_alter(&$settings, AttachedAssetsInterface $assets) {
 }
 
 /**
+ * Implements hook_entity_view_alter().
+ */
+function system_entity_view_alter(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display) {
+  if ($display instanceof EntityDisplayWithLayoutInterface) {
+    \Drupal::classResolver()->getInstanceFromDefinition(FieldLayoutBuilder::class)
+      ->buildView($build, $display);
+  }
+}
+
+/**
  * Implements hook_form_alter().
  */
 function system_form_alter(&$form, FormStateInterface $form_state) {
+  $form_object = $form_state->getFormObject();
+  if ($form_object instanceof ContentEntityFormInterface && $display = $form_object->getFormDisplay($form_state)) {
+    if ($display instanceof EntityDisplayWithLayoutInterface) {
+      \Drupal::classResolver()->getInstanceFromDefinition(FieldLayoutBuilder::class)
+        ->buildForm($form, $display);
+    }
+  }
+
   // If the page that's being built is cacheable, set the 'immutable' flag, to
   // ensure that when the form is used, a new form build ID is generated when
   // appropriate, to prevent information disclosure.
diff --git a/core/modules/layout_discovery/templates/layout.html.twig b/core/modules/system/templates/layout.html.twig
similarity index 100%
copy from core/modules/layout_discovery/templates/layout.html.twig
copy to core/modules/system/templates/layout.html.twig
diff --git a/core/modules/system/tests/modules/field_layout_test/config/schema/field_layout_test.schema.yml b/core/modules/system/tests/modules/field_layout_test/config/schema/field_layout_test.schema.yml
new file mode 100644
index 0000000..dc95ab3
--- /dev/null
+++ b/core/modules/system/tests/modules/field_layout_test/config/schema/field_layout_test.schema.yml
@@ -0,0 +1,7 @@
+layout_plugin.settings.test_layout_main_and_footer:
+  type: layout_plugin.settings
+  label: 'Layout test plugin settings'
+  mapping:
+    setting_1:
+      type: string
+      label: 'Setting 1'
diff --git a/core/modules/system/tests/modules/field_layout_test/field_layout_test.info.yml b/core/modules/system/tests/modules/field_layout_test/field_layout_test.info.yml
new file mode 100644
index 0000000..4d699e4
--- /dev/null
+++ b/core/modules/system/tests/modules/field_layout_test/field_layout_test.info.yml
@@ -0,0 +1,8 @@
+name: 'Field Layout test'
+type: module
+description: 'Support module for Field Layout tests.'
+core: 8.x
+package: Testing
+version: VERSION
+dependencies:
+  - entity_test
diff --git a/core/modules/system/tests/modules/field_layout_test/field_layout_test.routing.yml b/core/modules/system/tests/modules/field_layout_test/field_layout_test.routing.yml
new file mode 100644
index 0000000..bcea288
--- /dev/null
+++ b/core/modules/system/tests/modules/field_layout_test/field_layout_test.routing.yml
@@ -0,0 +1,7 @@
+entity.entity_test.test_view_mode:
+  path: '/entity_test/{entity_test}/test'
+  defaults:
+    _entity_view: 'entity_test.test'
+    _title: 'Test test view mode'
+  requirements:
+    _entity_access: 'entity_test.view'
diff --git a/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutContentFooter.php b/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutContentFooter.php
new file mode 100644
index 0000000..c283c82
--- /dev/null
+++ b/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutContentFooter.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Drupal\field_layout_test\Plugin\Layout;
+
+use Drupal\Core\Layout\LayoutDefault;
+
+/**
+ * Provides an annotated layout plugin for field_layout tests.
+ *
+ * @Layout(
+ *   id = "test_layout_content_and_footer",
+ *   label = @Translation("Test plugin: Content and Footer"),
+ *   category = @Translation("Layout test"),
+ *   description = @Translation("Test layout"),
+ *   regions = {
+ *     "content" = {
+ *       "label" = @Translation("Content Region")
+ *     },
+ *     "footer" = {
+ *       "label" = @Translation("Footer Region")
+ *     }
+ *   },
+ * )
+ */
+class TestLayoutContentFooter extends LayoutDefault {
+
+}
diff --git a/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutMainFooter.php b/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutMainFooter.php
new file mode 100644
index 0000000..cfe95e1
--- /dev/null
+++ b/core/modules/system/tests/modules/field_layout_test/src/Plugin/Layout/TestLayoutMainFooter.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Drupal\field_layout_test\Plugin\Layout;
+
+use Drupal\Core\Layout\LayoutDefault;
+
+/**
+ * Provides an annotated layout plugin for field_layout tests.
+ *
+ * @Layout(
+ *   id = "test_layout_main_and_footer",
+ *   label = @Translation("Test plugin: Main and Footer"),
+ *   category = @Translation("Layout test"),
+ *   description = @Translation("Test layout"),
+ *   regions = {
+ *     "main" = {
+ *       "label" = @Translation("Main Region")
+ *     },
+ *     "footer" = {
+ *       "label" = @Translation("Footer Region")
+ *     }
+ *   },
+ *   config_dependencies = {
+ *     "module" = {
+ *       "dependency_from_annotation",
+ *     },
+ *   },
+ * )
+ */
+class TestLayoutMainFooter extends LayoutDefault {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return [
+      'setting_1' => 'Default',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function calculateDependencies() {
+    $dependencies = parent::calculateDependencies();
+    $dependencies['module'][] = 'dependency_from_calculateDependencies';
+    return $dependencies;
+  }
+
+}
diff --git a/core/profiles/standard/config/install/core.entity_form_display.block_content.basic.default.yml b/core/profiles/standard/config/install/core.entity_form_display.block_content.basic.default.yml
index 7ccb5b0..64fe0b2 100644
--- a/core/profiles/standard/config/install/core.entity_form_display.block_content.basic.default.yml
+++ b/core/profiles/standard/config/install/core.entity_form_display.block_content.basic.default.yml
@@ -29,3 +29,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_form_display.comment.comment.default.yml b/core/profiles/standard/config/install/core.entity_form_display.comment.comment.default.yml
index 1010be2..722d224 100644
--- a/core/profiles/standard/config/install/core.entity_form_display.comment.comment.default.yml
+++ b/core/profiles/standard/config/install/core.entity_form_display.comment.comment.default.yml
@@ -31,3 +31,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_form_display.node.article.default.yml b/core/profiles/standard/config/install/core.entity_form_display.node.article.default.yml
index c94e36e..efcddfa 100644
--- a/core/profiles/standard/config/install/core.entity_form_display.node.article.default.yml
+++ b/core/profiles/standard/config/install/core.entity_form_display.node.article.default.yml
@@ -91,3 +91,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_form_display.node.page.default.yml b/core/profiles/standard/config/install/core.entity_form_display.node.page.default.yml
index 0b7ffd1..da1899e 100644
--- a/core/profiles/standard/config/install/core.entity_form_display.node.page.default.yml
+++ b/core/profiles/standard/config/install/core.entity_form_display.node.page.default.yml
@@ -65,3 +65,5 @@ content:
       placeholder: ''
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_form_display.user.user.default.yml b/core/profiles/standard/config/install/core.entity_form_display.user.user.default.yml
index 6832229..97a6796 100644
--- a/core/profiles/standard/config/install/core.entity_form_display.user.user.default.yml
+++ b/core/profiles/standard/config/install/core.entity_form_display.user.user.default.yml
@@ -33,3 +33,5 @@ content:
     weight: -1
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.block_content.basic.default.yml b/core/profiles/standard/config/install/core.entity_view_display.block_content.basic.default.yml
index e494882..ecacd3b 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.block_content.basic.default.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.block_content.basic.default.yml
@@ -19,3 +19,5 @@ content:
     settings: {  }
     third_party_settings: {  }
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.comment.comment.default.yml b/core/profiles/standard/config/install/core.entity_view_display.comment.comment.default.yml
index 6ae213d..69731e4 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.comment.comment.default.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.comment.comment.default.yml
@@ -22,3 +22,5 @@ content:
     weight: 100
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.node.article.default.yml b/core/profiles/standard/config/install/core.entity_view_display.node.article.default.yml
index 5c43252..0dc417d 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.node.article.default.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.node.article.default.yml
@@ -58,3 +58,5 @@ content:
 hidden:
   field_image: true
   field_tags: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.node.article.rss.yml b/core/profiles/standard/config/install/core.entity_view_display.node.article.rss.yml
index 84660b6..e3f3d6d 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.node.article.rss.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.node.article.rss.yml
@@ -23,3 +23,5 @@ hidden:
   comment: true
   field_image: true
   field_tags: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.node.article.teaser.yml b/core/profiles/standard/config/install/core.entity_view_display.node.article.teaser.yml
index 7b96908..3032b79 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.node.article.teaser.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.node.article.teaser.yml
@@ -50,3 +50,5 @@ hidden:
   comment: true
   field_image: true
   field_tags: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.node.page.default.yml b/core/profiles/standard/config/install/core.entity_view_display.node.page.default.yml
index 8afd942..02f39e5 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.node.page.default.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.node.page.default.yml
@@ -23,3 +23,5 @@ content:
     weight: 101
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.node.page.teaser.yml b/core/profiles/standard/config/install/core.entity_view_display.node.page.teaser.yml
index bc7a68c..fd6e5f8 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.node.page.teaser.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.node.page.teaser.yml
@@ -25,3 +25,5 @@ content:
     weight: 101
     region: content
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.user.user.compact.yml b/core/profiles/standard/config/install/core.entity_view_display.user.user.compact.yml
index 2ff13ad..679c837 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.user.user.compact.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.user.user.compact.yml
@@ -24,3 +24,5 @@ content:
     label: hidden
 hidden:
   member_for: true
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/profiles/standard/config/install/core.entity_view_display.user.user.default.yml b/core/profiles/standard/config/install/core.entity_view_display.user.user.default.yml
index ef1fdd7..086c086 100644
--- a/core/profiles/standard/config/install/core.entity_view_display.user.user.default.yml
+++ b/core/profiles/standard/config/install/core.entity_view_display.user.user.default.yml
@@ -25,3 +25,5 @@ content:
     third_party_settings: {  }
     label: hidden
 hidden: {  }
+layout_id: layout_onecol
+layout_settings: {  }
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/EntityViewDisplayTest.php b/core/tests/Drupal/KernelTests/Core/Entity/EntityViewDisplayTest.php
new file mode 100644
index 0000000..0246d79
--- /dev/null
+++ b/core/tests/Drupal/KernelTests/Core/Entity/EntityViewDisplayTest.php
@@ -0,0 +1,157 @@
+<?php
+
+namespace Drupal\KernelTests\Core\Entity;
+
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Entity\Entity\EntityViewDisplay
+ * @group Entity
+ */
+class EntityViewDisplayTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = ['entity_test', 'field_layout_test', 'system'];
+
+  /**
+   * @covers ::preSave
+   * @covers ::calculateDependencies
+   */
+  public function testPreSave() {
+    // Create an entity display with one hidden and one visible field.
+    $entity_display = EntityViewDisplay::create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'default',
+      'status' => TRUE,
+      'content' => [
+        'foo' => ['type' => 'visible'],
+        'bar' => ['type' => 'hidden'],
+        'name' => ['type' => 'hidden', 'region' => 'content'],
+      ],
+    ]);
+
+    $expected = [
+      'langcode' => 'en',
+      'status' => TRUE,
+      'dependencies' => [],
+      'id' => 'entity_test.entity_test.default',
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'default',
+      'content' => [
+        'foo' => [
+          'type' => 'visible',
+        ],
+        'bar' => [
+          'type' => 'hidden',
+        ],
+      ],
+      'hidden' => [],
+      'layout_id' => 'layout_onecol',
+      'layout_settings' => [],
+    ];
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // Save the display.
+    // the 'content' property and the visible field has the default region set.
+    $entity_display->save();
+
+    // The dependencies have been updated.
+    $expected['dependencies']['module'] = [
+      'entity_test',
+      'system',
+    ];
+    // A third party setting is added by the entity_test module.
+    $expected['third_party_settings']['entity_test'] = ['foo' => 'bar'];
+    // The visible field is assigned the default region.
+    $expected['content']['foo']['region'] = 'content';
+    // The hidden field is removed from the list of visible fields, and marked
+    // as hidden.
+    unset($expected['content']['bar']);
+    $expected['hidden'] = ['bar' => TRUE];
+
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // Assign a new layout that has default settings and complex dependencies,
+    // but do not save yet.
+    $entity_display->setLayoutId('test_layout_main_and_footer');
+
+    // The default settings were added.
+    $expected['layout_id'] = 'test_layout_main_and_footer';
+    $expected['layout_settings'] = [
+      'setting_1' => 'Default',
+    ];
+    // The field was moved to the default region.
+    $expected['content']['foo'] = [
+      'type' => 'visible',
+      'region' => 'main',
+      'weight' => -4,
+      'settings' => [],
+      'third_party_settings' => [],
+    ];
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // After saving, the dependencies have been updated.
+    $entity_display->save();
+    $expected['dependencies']['module'] = [
+      'dependency_from_annotation',
+      'dependency_from_calculateDependencies',
+      'entity_test',
+      'field_layout_test',
+    ];
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // Assign a layout with provided settings.
+    $entity_display->setLayoutId('test_layout_main_and_footer', ['setting_1' => 'foobar']);
+    $entity_display->save();
+
+    // The setting overrides the default value.
+    $expected['layout_settings']['setting_1'] = 'foobar';
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // Move a field to the non-default region.
+    $component = $entity_display->getComponent('foo');
+    $component['region'] = 'footer';
+    $entity_display->setComponent('foo', $component);
+    $entity_display->save();
+
+    // The field region is saved.
+    $expected['content']['foo']['region'] = 'footer';
+    $this->assertEntityValues($expected, $entity_display->toArray());
+
+    // Assign a different layout that shares the same non-default region.
+    $entity_display->setLayoutId('test_layout_content_and_footer');
+    $entity_display->save();
+
+    // The dependencies have been updated.
+    $expected['dependencies']['module'] = [
+      'entity_test',
+      'field_layout_test',
+    ];
+    // The layout has been updated.
+    $expected['layout_id'] = 'test_layout_content_and_footer';
+    $expected['layout_settings'] = [];
+    // The field remains in its current region instead of moving to the default.
+    $this->assertEntityValues($expected, $entity_display->toArray());
+  }
+
+  /**
+   * Asserts than an entity has the correct values.
+   *
+   * @param mixed $expected
+   * @param array $values
+   * @param string $message
+   */
+  public static function assertEntityValues($expected, array $values, $message = '') {
+
+    static::assertArrayHasKey('uuid', $values);
+    unset($values['uuid']);
+
+    static::assertEquals($expected, $values, $message);
+  }
+
+}
diff --git a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php b/core/tests/Drupal/KernelTests/Core/Layout/LayoutTest.php
similarity index 97%
rename from core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
rename to core/tests/Drupal/KernelTests/Core/Layout/LayoutTest.php
index 8602377..d1dace3 100644
--- a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Layout/LayoutTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Drupal\Tests\layout_discovery\Kernel;
+namespace Drupal\KernelTests\Core\Layout;
 
 use Drupal\Core\Form\FormState;
 use Drupal\KernelTests\KernelTestBase;
@@ -15,7 +15,7 @@ class LayoutTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['system', 'layout_discovery', 'layout_test'];
+  public static $modules = ['system', 'layout_test'];
 
   /**
    * The layout plugin manager.
diff --git a/core/tests/Drupal/Tests/Core/Entity/Display/FieldLayoutBuilderTest.php b/core/tests/Drupal/Tests/Core/Entity/Display/FieldLayoutBuilderTest.php
new file mode 100644
index 0000000..5569ad0
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Entity/Display/FieldLayoutBuilderTest.php
@@ -0,0 +1,308 @@
+<?php
+
+namespace Drupal\Tests\Core\Entity\Display;
+
+use Drupal\Core\Entity\EntityFieldManagerInterface;
+use Drupal\Core\Field\FieldDefinitionInterface;
+use Drupal\Core\Entity\Display\EntityDisplayWithLayoutInterface;
+use Drupal\Core\Entity\Display\FieldLayoutBuilder;
+use Drupal\Core\Layout\LayoutPluginManagerInterface;
+use Drupal\Core\Layout\LayoutDefault;
+use Drupal\Core\Layout\LayoutDefinition;
+use Drupal\Tests\UnitTestCase;
+use Prophecy\Argument;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Entity\Display\FieldLayoutBuilder
+ * @group Entity
+ */
+class FieldLayoutBuilderTest extends UnitTestCase {
+
+  /**
+   * @var \Drupal\Core\Layout\LayoutPluginManager|\Prophecy\Prophecy\ProphecyInterface
+   */
+  protected $layoutPluginManager;
+
+  /**
+   * @var \Drupal\Core\Entity\EntityFieldManagerInterface|\Prophecy\Prophecy\ProphecyInterface
+   */
+  protected $entityFieldManager;
+
+  /**
+   * @var \Drupal\Core\Entity\Display\FieldLayoutBuilder
+   */
+  protected $fieldLayoutBuilder;
+
+  /**
+   * @var \Drupal\Core\Layout\LayoutInterface
+   */
+  protected $layoutPlugin;
+
+  /**
+   * @var \Drupal\Core\Layout\LayoutDefinition
+   */
+  protected $pluginDefinition;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->pluginDefinition = new LayoutDefinition([
+      'library' => 'system/drupal.layout.twocol',
+      'theme_hook' => 'layout__twocol',
+      'regions' => [
+        'left' => [
+          'label' => 'Left',
+        ],
+        'right' => [
+          'label' => 'Right',
+        ],
+      ],
+    ]);
+    $this->layoutPlugin = new LayoutDefault([], 'two_column', $this->pluginDefinition);
+
+    $this->layoutPluginManager = $this->prophesize(LayoutPluginManagerInterface::class);
+    $this->layoutPluginManager->getDefinition('unknown', FALSE)->willReturn(NULL);
+    $this->layoutPluginManager->getDefinition('two_column', FALSE)->willReturn($this->pluginDefinition);
+
+    $this->entityFieldManager = $this->prophesize(EntityFieldManagerInterface::class);
+
+    $this->fieldLayoutBuilder = new FieldLayoutBuilder($this->layoutPluginManager->reveal(), $this->entityFieldManager->reveal());
+  }
+
+  /**
+   * @covers ::buildView
+   * @covers ::getFields
+   */
+  public function testBuildView() {
+    $definitions = [];
+    $non_configurable_field_definition = $this->prophesize(FieldDefinitionInterface::class);
+    $non_configurable_field_definition->isDisplayConfigurable('view')->willReturn(FALSE);
+    $definitions['non_configurable_field'] = $non_configurable_field_definition->reveal();
+    $definitions['non_configurable_field_with_extra_field'] = $non_configurable_field_definition->reveal();
+    $this->entityFieldManager->getFieldDefinitions('the_entity_type_id', 'the_entity_type_bundle')->willReturn($definitions);
+    $extra_fields = [];
+    $extra_fields['non_configurable_field_with_extra_field'] = [
+      'label' => 'This non-configurable field is also defined in hook_entity_extra_field_info()',
+    ];
+    $this->entityFieldManager->getExtraFields('the_entity_type_id', 'the_entity_type_bundle')->willReturn($extra_fields);
+
+    $build = [
+      'test1' => [
+        '#markup' => 'Test1',
+      ],
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+      'non_configurable_field_with_extra_field' => [
+        '#markup' => 'Non-configurable with extra field',
+      ],
+    ];
+
+    $display = $this->prophesize(EntityDisplayWithLayoutInterface::class);
+    $display->getTargetEntityTypeId()->willReturn('the_entity_type_id');
+    $display->getTargetBundle()->willReturn('the_entity_type_bundle');
+    $display->getLayout()->willReturn($this->layoutPlugin);
+    $display->getLayoutId()->willReturn('two_column');
+    $display->getLayoutSettings()->willReturn([]);
+    $display->getComponents()->willReturn([
+      'test1' => [
+        'region' => 'right',
+      ],
+      'non_configurable_field' => [
+        'region' => 'left',
+      ],
+      'non_configurable_field_with_extra_field' => [
+        'region' => 'left',
+      ],
+    ]);
+
+    $expected = [
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+      'layout' => [
+        'left' => [
+          'non_configurable_field_with_extra_field' => [
+            '#markup' => 'Non-configurable with extra field',
+          ],
+        ],
+        'right' => [
+          'test1' => [
+            '#markup' => 'Test1',
+          ],
+        ],
+        '#settings' => [],
+        '#layout' => $this->pluginDefinition,
+        '#theme' => 'layout__twocol',
+        '#attached' => [
+          'library' => [
+            'system/drupal.layout.twocol',
+          ],
+        ],
+      ],
+    ];
+    $this->fieldLayoutBuilder->buildView($build, $display->reveal());
+    $this->assertEquals($expected, $build);
+    $this->assertSame($expected, $build);
+  }
+
+  /**
+   * @covers ::buildForm
+   * @covers ::getFields
+   */
+  public function testBuildForm() {
+    $definitions = [];
+    $non_configurable_field_definition = $this->prophesize(FieldDefinitionInterface::class);
+    $non_configurable_field_definition->isDisplayConfigurable('form')->willReturn(FALSE);
+    $definitions['non_configurable_field'] = $non_configurable_field_definition->reveal();
+    $this->entityFieldManager->getFieldDefinitions('the_entity_type_id', 'the_entity_type_bundle')->willReturn($definitions);
+    $this->entityFieldManager->getExtraFields('the_entity_type_id', 'the_entity_type_bundle')->willReturn([]);
+
+    $build = [
+      'test1' => [
+        '#markup' => 'Test1',
+      ],
+      'test2' => [
+        '#markup' => 'Test2',
+        '#group' => 'existing_group',
+      ],
+      'field_layout' => [
+        '#markup' => 'Field created through the UI happens to be named "Layout"',
+      ],
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+    ];
+
+    $display = $this->prophesize(EntityDisplayWithLayoutInterface::class);
+    $display->getTargetEntityTypeId()->willReturn('the_entity_type_id');
+    $display->getTargetBundle()->willReturn('the_entity_type_bundle');
+    $display->getLayout()->willReturn($this->layoutPlugin);
+    $display->getLayoutId()->willReturn('two_column');
+    $display->getLayoutSettings()->willReturn([]);
+    $display->getComponents()->willReturn([
+      'test1' => [
+        'region' => 'right',
+      ],
+      'test2' => [
+        'region' => 'left',
+      ],
+      'field_layout' => [
+        'region' => 'right',
+      ],
+      'non_configurable_field' => [
+        'region' => 'left',
+      ],
+    ]);
+
+    $expected = [
+      'test1' => [
+        '#markup' => 'Test1',
+        '#group' => 'right',
+      ],
+      'test2' => [
+        '#markup' => 'Test2',
+        '#group' => 'existing_group',
+      ],
+      'field_layout' => [
+        '#markup' => 'Field created through the UI happens to be named "Layout"',
+        '#group' => 'right',
+      ],
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+      'layout' => [
+        'left' => [
+          '#process' => ['\Drupal\Core\Render\Element\RenderElement::processGroup'],
+          '#pre_render' => ['\Drupal\Core\Render\Element\RenderElement::preRenderGroup'],
+        ],
+        'right' => [
+          '#process' => ['\Drupal\Core\Render\Element\RenderElement::processGroup'],
+          '#pre_render' => ['\Drupal\Core\Render\Element\RenderElement::preRenderGroup'],
+        ],
+        '#settings' => [],
+        '#layout' => $this->pluginDefinition,
+        '#theme' => 'layout__twocol',
+        '#attached' => [
+          'library' => [
+            'system/drupal.layout.twocol',
+          ],
+        ],
+      ],
+    ];
+    $this->fieldLayoutBuilder->buildForm($build, $display->reveal());
+    $this->assertEquals($expected, $build);
+    $this->assertSame($expected, $build);
+  }
+
+  /**
+   * @covers ::buildForm
+   */
+  public function testBuildFormEmpty() {
+    $definitions = [];
+    $non_configurable_field_definition = $this->prophesize(FieldDefinitionInterface::class);
+    $non_configurable_field_definition->isDisplayConfigurable('form')->willReturn(FALSE);
+    $definitions['non_configurable_field'] = $non_configurable_field_definition->reveal();
+    $this->entityFieldManager->getFieldDefinitions('the_entity_type_id', 'the_entity_type_bundle')->willReturn($definitions);
+    $this->entityFieldManager->getExtraFields('the_entity_type_id', 'the_entity_type_bundle')->willReturn([]);
+
+    $build = [
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+    ];
+
+    $display = $this->prophesize(EntityDisplayWithLayoutInterface::class);
+    $display->getTargetEntityTypeId()->willReturn('the_entity_type_id');
+    $display->getTargetBundle()->willReturn('the_entity_type_bundle');
+    $display->getLayout()->willReturn($this->layoutPlugin);
+    $display->getLayoutId()->willReturn('two_column');
+    $display->getLayoutSettings()->willReturn([]);
+    $display->getComponents()->willReturn([
+      'test1' => [
+        'region' => 'right',
+      ],
+      'non_configurable_field' => [
+        'region' => 'left',
+      ],
+    ]);
+
+    $expected = [
+      'non_configurable_field' => [
+        '#markup' => 'Non-configurable',
+      ],
+    ];
+    $this->fieldLayoutBuilder->buildForm($build, $display->reveal());
+    $this->assertSame($expected, $build);
+  }
+
+  /**
+   * @covers ::buildForm
+   */
+  public function testBuildFormNoLayout() {
+    $this->entityFieldManager->getFieldDefinitions(Argument::any(), Argument::any())->shouldNotBeCalled();
+
+    $build = [
+      'test1' => [
+        '#markup' => 'Test1',
+      ],
+    ];
+
+    $display = $this->prophesize(EntityDisplayWithLayoutInterface::class);
+    $display->getLayoutId()->willReturn('unknown');
+    $display->getLayoutSettings()->willReturn([]);
+    $display->getComponents()->shouldNotBeCalled();
+
+    $expected = [
+      'test1' => [
+        '#markup' => 'Test1',
+      ],
+    ];
+    $this->fieldLayoutBuilder->buildForm($build, $display->reveal());
+    $this->assertSame($expected, $build);
+  }
+
+}
diff --git a/core/themes/stable/templates/layout/layout--onecol.html.twig b/core/themes/stable/templates/layout/layout--onecol.html.twig
new file mode 100644
index 0000000..69fed03
--- /dev/null
+++ b/core/themes/stable/templates/layout/layout--onecol.html.twig
@@ -0,0 +1,24 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a one-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+set classes = [
+'layout--onecol',
+]
+%}
+{% if content %}
+<div{{ attributes.addClass(classes) }}>
+  <div class="layout-region layout-region--content">
+    {{ content }}
+  </div>
+</div>
+{% endif %}
diff --git a/core/themes/stable/templates/layout/layout--twocol.html.twig b/core/themes/stable/templates/layout/layout--twocol.html.twig
new file mode 100644
index 0000000..8e54d30
--- /dev/null
+++ b/core/themes/stable/templates/layout/layout--twocol.html.twig
@@ -0,0 +1,28 @@
+{#
+/**
+ * @file
+ * Default theme implementation to display a two-column layout.
+ *
+ * Available variables:
+ * - content: The content for this layout.
+ * - attributes: HTML attributes for the layout <div>.
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+set classes = [
+'layout--twocol',
+]
+%}
+{% if content %}
+  <div{{ attributes.addClass(classes) }}>
+    <div class="layout-region layout-region--left">
+      {{ content.left }}
+    </div>
+
+    <div class="layout-region layout-region--right">
+      {{ content.right }}
+    </div>
+  </div>
+{% endif %}
diff --git a/core/modules/layout_discovery/templates/layout.html.twig b/core/themes/stable/templates/layout/layout.html.twig
similarity index 100%
rename from core/modules/layout_discovery/templates/layout.html.twig
rename to core/themes/stable/templates/layout/layout.html.twig
