diff --git a/paragraphs_collection.links.menu.yml b/paragraphs_collection.links.menu.yml
new file mode 100644
index 0000000..4ad0cdf
--- /dev/null
+++ b/paragraphs_collection.links.menu.yml
@@ -0,0 +1,6 @@
+paragraphs_collection.layouts:
+  title: 'Paragraphs Collection'
+  parent: system.admin_reports
+  description: 'Overview of all layouts and styles for the respective plugins.'
+  route_name: paragraphs_collection.layouts
+  menu_name: admin
diff --git a/paragraphs_collection.links.task.yml b/paragraphs_collection.links.task.yml
new file mode 100644
index 0000000..b27a824
--- /dev/null
+++ b/paragraphs_collection.links.task.yml
@@ -0,0 +1,12 @@
+# @todo Add all the tab links.
+
+paragraphs_collection.layouts:
+  title: Layouts
+  route_name: paragraphs_collection.layouts
+  base_route: paragraphs_collection.layouts
+
+paragraphs_collection.styles:
+  title: Styles
+  route_name: paragraphs_collection.styles
+  base_route: paragraphs_collection.layouts
+
diff --git a/paragraphs_collection.routing.yml b/paragraphs_collection.routing.yml
new file mode 100644
index 0000000..fef898f
--- /dev/null
+++ b/paragraphs_collection.routing.yml
@@ -0,0 +1,18 @@
+# @todo Just one class with two content functions, or two classes inheriting
+#   from one?
+
+paragraphs_collection.layouts:
+  path: '/admin/reports/paragraphs_collection/layouts'
+  defaults:
+    _controller: '\Drupal\paragraphs_collection\Controller\OverviewController::layouts'
+    _title: 'Available layouts (grid layout plugin)'
+  requirements:
+    _permission: 'administer paragraphs types' # @todo Change this?
+
+paragraphs_collection.styles:
+  path: '/admin/reports/paragraphs_collection/styles'
+  defaults:
+    _controller: '\Drupal\paragraphs_collection\Controller\OverviewController::styles'
+    _title: 'Available Styles (styles plugin)'
+  requirements:
+    _permission: 'administer paragraphs types' # @todo Change this?
diff --git a/src/Controller/OverviewController.php b/src/Controller/OverviewController.php
new file mode 100644
index 0000000..78316a8
--- /dev/null
+++ b/src/Controller/OverviewController.php
@@ -0,0 +1,229 @@
+<?php
+
+namespace Drupal\paragraphs_collection\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\paragraphs\Entity\ParagraphsType;
+use Drupal\paragraphs_collection\GridLayoutDiscoveryInterface;
+use Drupal\paragraphs_collection\StyleDiscoveryInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * The controller for overviews of Paragraphs Collection's discoverable items.
+ */
+class OverviewController extends ControllerBase {
+
+  /**
+   * The discovery service for grid layout files.
+   *
+   * @var \Drupal\paragraphs_collection\GridLayoutDiscoveryInterface
+   */
+  protected $gridDiscovery;
+
+  /**
+   * The discovery service for style files.
+   *
+   * @var \Drupal\paragraphs_collection\StyleDiscoveryInterface
+   */
+  protected $styleDiscovery;
+
+  /**
+   * Arrays of grid layout machine names keyed by Paragraph Type IDs.
+   *
+   * Each Paragraph Type has all enabled layouts in its array. Exception: An
+   * empty array means that all layouts are enabled for that Paragraphs Type.
+   *
+   * @var array
+   */
+  protected $paragraphsTypesLayoutsEnabled;
+
+  /**
+   * Machine names of style groups keyed by IDs of Paragraph Types.
+   *
+   * Each Paragraph Type has the style group is uses as the value. Exception: An
+   * empty string means that all style groups are enabled for that Paragraphs
+   * Type.
+   *
+   * @var array
+   */
+  protected $paragraphsTypesStyleGroupsUsed;
+
+  /**
+   * Constructs a \Drupal\paragraphs_collection\Controller\OverviewController object.
+   *
+   * @param \Drupal\paragraphs_collection\GridLayoutDiscoveryInterface $grid_discovery
+   *   The discovery service for grid layout files.
+   * @param \Drupal\paragraphs_collection\StyleDiscoveryInterface $style_discovery
+   *   The discovery service for style files.
+   */
+  public function __construct(GridLayoutDiscoveryInterface $grid_discovery, StyleDiscoveryInterface $style_discovery) {
+    $this->gridDiscovery = $grid_discovery;
+    $this->styleDiscovery = $style_discovery;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('paragraphs_collection.grid_layout_discovery'),
+      $container->get('paragraphs_collection.style_discovery')
+    );
+  }
+
+  /**
+   * Finds all Paragraphs Types which allow a grid layout behaviour.
+   *
+   * @return array
+   *   Arrays of grid layout machine names keyed by IDs of Paragraph Types which
+   *   have them enabled. A Paragraphs Type ID with an empty array as its value
+   *   means that all grid layouts are enabled for that Paragraphs Type.
+   */
+  public function getParagraphsTypesLayoutsEnabled() {
+    if (isset($this->paragraphsTypesLayoutsEnabled)) {
+      return $this->paragraphsTypesLayoutsEnabled;
+    }
+
+    $paragraph_type_ids = \Drupal::entityQuery('paragraphs_type')->execute();
+    $paragraphs_types_enabled = [];
+    foreach ($paragraph_type_ids as $paragraph_type_id) {
+      /** @var ParagraphsType $paragraphs_type */
+      $paragraphs_type = ParagraphsType::load($paragraph_type_id);
+      $configuration = $paragraphs_type->getBehaviorPlugin('grid_layout')->getConfiguration();
+      if (isset($configuration['enabled']) && $configuration['enabled']) {
+        $paragraphs_types_enabled[$paragraph_type_id] = [];
+        foreach ($configuration['available_grid_layouts'] as $key => $value) {
+          if ($value) {
+            $paragraphs_types_enabled[$paragraph_type_id][] = $key;
+          }
+        }
+      }
+    }
+    $this->paragraphsTypesLayoutsEnabled = $paragraphs_types_enabled;
+
+    return $this->paragraphsTypesLayoutsEnabled;
+  }
+
+  /**
+   * Finds all Paragraphs Types which allow a style behaviour.
+   *
+   * @return array
+   *   Style groups machine names keyed by IDs of Paragraph Types which have
+   *   them enabled. A Paragraphs Type ID with an empty sting as its value means
+   *   that all styles are enabled for that Paragraphs Type.
+   */
+  public function getParagraphsTypesStyleGroupsUsed() {
+    if (isset($this->paragraphsTypesStyleGroupsUsed)) {
+      return $this->paragraphsTypesStyleGroupsUsed;
+    }
+
+    $paragraph_type_ids = \Drupal::entityQuery('paragraphs_type')->execute();
+    $paragraphs_types_enabled = [];
+    foreach ($paragraph_type_ids as $paragraph_type_id) {
+      /** @var ParagraphsType $paragraphs_type */
+      $paragraphs_type = ParagraphsType::load($paragraph_type_id);
+      $configuration = $paragraphs_type->getBehaviorPlugin('style')->getConfiguration();
+      if (isset($configuration['enabled']) && $configuration['enabled']) {
+        $paragraphs_types_enabled[$paragraph_type_id] = $configuration['group'];
+      }
+    }
+    $this->paragraphsTypesStyleGroupsUsed = $paragraphs_types_enabled;
+
+    return $this->paragraphsTypesStyleGroupsUsed;
+  }
+
+  /**
+   * Finds all Paragraphs Types which allow a particular grid layout behaviour.
+   *
+   * @param string $layout
+   *   The machine name of the grid layout.
+   *
+*@return array
+   *   Array of IDs of Paragraphs Types that use the grid layout.
+   */
+  public function getParagraphsTypesPerLayout($layout) {
+    $paragraphs_types = [];
+    foreach ($this->getParagraphsTypesLayoutsEnabled() as $paragraphs_type => $enabled_layouts) {
+      if ($enabled_layouts == [] || in_array($layout, $enabled_layouts)) {
+        $paragraphs_types[] = $paragraphs_type;
+      }
+    }
+
+    return $paragraphs_types;
+  }
+
+  /**
+   * Finds all Paragraphs Types which allow a particular style behaviour.
+   *
+   * @param string $style
+   *   The machine name of the style.
+   * @return array
+   *   Array of IDs of Paragraphs Types that use the style.
+   */
+  public function getParagraphsTypesPerStyle($style) {
+    $paragraphs_types = [];
+    foreach ($this->getParagraphsTypesStyleGroupsUsed() as $paragraphs_type => $used_style_group) {
+      $enabled_styles = array_keys($this->styleDiscovery->getStyleOptions($used_style_group));
+      if (in_array($style, $enabled_styles)) {
+        $paragraphs_types[] = $paragraphs_type;
+      }
+    }
+
+    return $paragraphs_types;
+  }
+
+  /**
+   * Generates an overview page of available grid layouts.
+   *
+   * @return array
+   *   The output render array.
+   */
+  public function layouts() {
+    $layouts = $this->gridDiscovery->getGridLayouts();
+    foreach (array_keys($layouts) as $layout_id) {
+      $paragraphs_type_ids = $this->getParagraphsTypesPerLayout($layout_id);
+      foreach ($paragraphs_type_ids as $paragraphs_type_id) {
+        $paragraphs_type = ParagraphsType::load($paragraphs_type_id);
+        $path = $paragraphs_type->toUrl()->getInternalPath();
+      }
+    }
+
+    return $this->content(['layouts']);
+  }
+
+  /**
+   * Generates an overview page of available styles.
+   *
+   * @return array
+   *   The output render array.
+   */
+  public function styles() {
+    $styles = $this->styleDiscovery->getStyles();
+    foreach (array_keys($styles) as $style_id) {
+      $paragraphs_type_ids = $this->getParagraphsTypesPerStyle($style_id);
+      foreach ($paragraphs_type_ids as $paragraphs_type_id) {
+        $paragraphs_type = ParagraphsType::load($paragraphs_type_id);
+        $path = $paragraphs_type->toUrl()->getInternalPath();
+      }
+    }
+
+    return $this->content(['styles']);
+  }
+
+  /**
+   * Generates an overview page of available layouts and/or styles.
+   *
+   * @param array $item_types
+   *   Array of item types to list. Supported types are 'styles' and 'layouts'.
+   * @return array
+   *   The output render array.
+   */
+  public function content($item_types) {
+    $build = [
+      '#type' => 'markup',
+      '#markup' => t('Hello World! (' . implode('', $item_types) . ')'),
+    ];
+    return $build;
+  }
+
+}