diff --git a/core/modules/system/lib/Drupal/system/Controller/ThemeController.php b/core/modules/system/lib/Drupal/system/Controller/ThemeController.php
index 61d931c..3017b6e 100644
--- a/core/modules/system/lib/Drupal/system/Controller/ThemeController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/ThemeController.php
@@ -123,4 +123,139 @@ public function enable(Request $request) {
     throw new AccessDeniedHttpException();
   }
 
+
+  /**
+   * Displays a listing of all themes.
+   */
+  public function getAllThemes() {
+    // Get current list of themes.
+    $themes = system_rebuild_theme_data();
+    uasort($themes, 'system_sort_modules_by_info_name');
+
+    $theme_default = config('system.theme')->get('default');
+    $theme_groups  = array();
+    $admin_theme = config('system.theme')->get('admin');
+
+    foreach ($themes as &$theme) {
+      if (!empty($theme->info['hidden'])) {
+        continue;
+      }
+      $theme->is_default = ($theme->name == $theme_default);
+
+      // Identify theme screenshot.
+      $theme->screenshot = NULL;
+      // Create a list which includes the current theme and all its base themes.
+      if (isset($themes[$theme->name]->base_themes)) {
+        $theme_keys = array_keys($themes[$theme->name]->base_themes);
+        $theme_keys[] = $theme->name;
+      }
+      else {
+        $theme_keys = array($theme->name);
+      }
+      // Look for a screenshot in the current theme or in its closest ancestor.
+      foreach (array_reverse($theme_keys) as $theme_key) {
+        if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
+          $theme->screenshot = array(
+            'uri' => $themes[$theme_key]->info['screenshot'],
+            'alt' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
+            'title' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
+            'attributes' => array('class' => array('screenshot')),
+          );
+          break;
+        }
+      }
+
+      if (empty($theme->status)) {
+        // Ensure this theme is compatible with this version of core.
+        // Require the 'content' region to make sure the main page
+        // content has a common place in all themes.
+        $theme->incompatible_core = !isset($theme->info['core']) || ($theme->info['core'] != DRUPAL_CORE_COMPATIBILITY) || (!isset($theme->info['regions']['content']));
+        $theme->incompatible_php = version_compare(phpversion(), $theme->info['php']) < 0;
+        // Confirmed that the base theme is available.
+        $theme->incompatible_base = (isset($theme->info['base theme']) && !isset($themes[$theme->info['base theme']]));
+        // Confirm that the theme engine is available.
+        $theme->incompatible_engine = (isset($theme->info['engine']) && !isset($theme->owner));
+      }
+      $query['token'] = drupal_get_token('system-theme-operation-link');
+      $theme->operations = array();
+      if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine) {
+        // Create the operations links.
+        $query['theme'] = $theme->name;
+        if (drupal_theme_access($theme)) {
+          $theme->operations[] = array(
+            'title' => t('Settings'),
+            'href' => 'admin/appearance/settings/' . $theme->name,
+            'attributes' => array('title' => t('Settings for !theme theme', array('!theme' => $theme->info['name']))),
+          );
+        }
+        if (!empty($theme->status)) {
+          if (!$theme->is_default) {
+            if ($theme->name != $admin_theme) {
+              $theme->operations[] = array(
+                'title' => t('Disable'),
+                'href' => 'admin/appearance/disable',
+                'query' => $query,
+                'attributes' => array('title' => t('Disable !theme theme', array('!theme' => $theme->info['name']))),
+              );
+            }
+            $theme->operations[] = array(
+              'title' => t('Set default'),
+              'href' => 'admin/appearance/default',
+              'query' => $query,
+              'attributes' => array('title' => t('Set !theme as default theme', array('!theme' => $theme->info['name']))),
+            );
+          }
+          $admin_theme_options[$theme->name] = $theme->info['name'];
+        }
+        else {
+          $theme->operations[] = array(
+            'title' => t('Enable'),
+            'href' => 'admin/appearance/enable',
+            'query' => $query,
+            'attributes' => array('title' => t('Enable !theme theme', array('!theme' => $theme->info['name']))),
+          );
+          $theme->operations[] = array(
+            'title' => t('Enable and set default'),
+            'href' => 'admin/appearance/default',
+            'query' => $query,
+            'attributes' => array('title' => t('Enable !theme as default theme', array('!theme' => $theme->info['name']))),
+          );
+        }
+      }
+
+      // Add notes to default and administration theme.
+      $theme->notes = array();
+      $theme->classes = array();
+      if ($theme->is_default) {
+        $theme->classes[] = 'theme-default';
+        $theme->notes[] = t('default theme');
+      }
+      if ($theme->name == $admin_theme || ($theme->is_default && $admin_theme == '0')) {
+        $theme->classes[] = 'theme-admin';
+        $theme->notes[] = t('admin theme');
+      }
+
+      // Sort enabled and disabled themes into their own groups.
+      $theme_groups[$theme->status ? 'enabled' : 'disabled'][] = $theme;
+    }
+
+    // There are two possible theme groups.
+    $theme_group_titles = array(
+      'enabled' => format_plural(count($theme_groups['enabled']), 'Enabled theme', 'Enabled themes'),
+    );
+    if (!empty($theme_groups['disabled'])) {
+      $theme_group_titles['disabled'] = format_plural(count($theme_groups['disabled']), 'Disabled theme', 'Disabled themes');
+    }
+
+    uasort($theme_groups['enabled'], 'system_sort_themes');
+    drupal_alter('system_themes_page', $theme_groups);
+
+    $admin_form = drupal_get_form('system_themes_admin_form', $admin_theme_options);
+    $system_themes_page = array(
+      '#theme' => 'system_themes_page',
+      '#theme_groups' => $theme_groups,
+      '#theme_group_titles' => $theme_group_titles,
+    );
+    return drupal_render($system_themes_page). drupal_render($admin_form);
+  }
 }
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 6177dfd..881255d 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -122,171 +122,6 @@ function system_admin_index() {
 }
 
 /**
- * Menu callback; displays a listing of all themes.
- */
-function system_themes_page() {
-  // Get current list of themes.
-  $themes = system_rebuild_theme_data();
-  uasort($themes, 'system_sort_modules_by_info_name');
-
-  $theme_default = config('system.theme')->get('default');
-  $theme_groups  = array();
-  $admin_theme = config('system.theme')->get('admin');
-
-  foreach ($themes as &$theme) {
-    if (!empty($theme->info['hidden'])) {
-      continue;
-    }
-    $theme->is_default = ($theme->name == $theme_default);
-
-    // Identify theme screenshot.
-    $theme->screenshot = NULL;
-    // Create a list which includes the current theme and all its base themes.
-    if (isset($themes[$theme->name]->base_themes)) {
-      $theme_keys = array_keys($themes[$theme->name]->base_themes);
-      $theme_keys[] = $theme->name;
-    }
-    else {
-      $theme_keys = array($theme->name);
-    }
-    // Look for a screenshot in the current theme or in its closest ancestor.
-    foreach (array_reverse($theme_keys) as $theme_key) {
-      if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
-        $theme->screenshot = array(
-          'uri' => $themes[$theme_key]->info['screenshot'],
-          'alt' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
-          'title' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
-          'attributes' => array('class' => array('screenshot')),
-        );
-        break;
-      }
-    }
-
-    if (empty($theme->status)) {
-     // Ensure this theme is compatible with this version of core.
-     // Require the 'content' region to make sure the main page
-     // content has a common place in all themes.
-      $theme->incompatible_core = !isset($theme->info['core']) || ($theme->info['core'] != DRUPAL_CORE_COMPATIBILITY) || (!isset($theme->info['regions']['content']));
-      $theme->incompatible_php = version_compare(phpversion(), $theme->info['php']) < 0;
-      // Confirmed that the base theme is available.
-      $theme->incompatible_base = (isset($theme->info['base theme']) && !isset($themes[$theme->info['base theme']]));
-      // Confirm that the theme engine is available.
-      $theme->incompatible_engine = (isset($theme->info['engine']) && !isset($theme->owner));
-    }
-    $query['token'] = drupal_get_token('system-theme-operation-link');
-    $theme->operations = array();
-    if (!empty($theme->status) || !$theme->incompatible_core && !$theme->incompatible_php && !$theme->incompatible_base && !$theme->incompatible_engine) {
-      // Create the operations links.
-      $query['theme'] = $theme->name;
-      if (drupal_theme_access($theme)) {
-        $theme->operations[] = array(
-          'title' => t('Settings'),
-          'href' => 'admin/appearance/settings/' . $theme->name,
-          'attributes' => array('title' => t('Settings for !theme theme', array('!theme' => $theme->info['name']))),
-        );
-      }
-      if (!empty($theme->status)) {
-        if (!$theme->is_default) {
-          if ($theme->name != $admin_theme) {
-            $theme->operations[] = array(
-              'title' => t('Disable'),
-              'href' => 'admin/appearance/disable',
-              'query' => $query,
-              'attributes' => array('title' => t('Disable !theme theme', array('!theme' => $theme->info['name']))),
-            );
-          }
-          $theme->operations[] = array(
-            'title' => t('Set default'),
-            'href' => 'admin/appearance/default',
-            'query' => $query,
-            'attributes' => array('title' => t('Set !theme as default theme', array('!theme' => $theme->info['name']))),
-          );
-        }
-        $admin_theme_options[$theme->name] = $theme->info['name'];
-      }
-      else {
-        $theme->operations[] = array(
-          'title' => t('Enable'),
-          'href' => 'admin/appearance/enable',
-          'query' => $query,
-          'attributes' => array('title' => t('Enable !theme theme', array('!theme' => $theme->info['name']))),
-        );
-        $theme->operations[] = array(
-          'title' => t('Enable and set default'),
-          'href' => 'admin/appearance/default',
-          'query' => $query,
-          'attributes' => array('title' => t('Enable !theme as default theme', array('!theme' => $theme->info['name']))),
-        );
-      }
-    }
-
-    // Add notes to default and administration theme.
-    $theme->notes = array();
-    $theme->classes = array();
-    if ($theme->is_default) {
-      $theme->classes[] = 'theme-default';
-      $theme->notes[] = t('default theme');
-    }
-    if ($theme->name == $admin_theme || ($theme->is_default && $admin_theme == '0')) {
-      $theme->classes[] = 'theme-admin';
-      $theme->notes[] = t('admin theme');
-    }
-
-    // Sort enabled and disabled themes into their own groups.
-    $theme_groups[$theme->status ? 'enabled' : 'disabled'][] = $theme;
-  }
-
-  // There are two possible theme groups.
-  $theme_group_titles = array(
-    'enabled' => format_plural(count($theme_groups['enabled']), 'Enabled theme', 'Enabled themes'),
-  );
-  if (!empty($theme_groups['disabled'])) {
-    $theme_group_titles['disabled'] = format_plural(count($theme_groups['disabled']), 'Disabled theme', 'Disabled themes');
-  }
-
-  uasort($theme_groups['enabled'], 'system_sort_themes');
-  drupal_alter('system_themes_page', $theme_groups);
-
-  $admin_form = drupal_get_form('system_themes_admin_form', $admin_theme_options);
-  return theme('system_themes_page', array('theme_groups' => $theme_groups, 'theme_group_titles' => $theme_group_titles)) . drupal_render($admin_form);
-}
-
-/**
- * Form to select the administration theme.
- *
- * @ingroup forms
- * @see system_themes_admin_form_submit()
- */
-function system_themes_admin_form($form, &$form_state, $theme_options) {
-  // Administration theme settings.
-  $form['admin_theme'] = array(
-    '#type' => 'details',
-    '#title' => t('Administration theme'),
-  );
-  $form['admin_theme']['admin_theme'] = array(
-    '#type' => 'select',
-    '#options' => array(0 => t('Default theme')) + $theme_options,
-    '#title' => t('Administration theme'),
-    '#description' => t('Choose "Default theme" to always use the same theme as the rest of the site.'),
-    '#default_value' => config('system.theme')->get('admin'),
-  );
-  $form['admin_theme']['actions'] = array('#type' => 'actions');
-  $form['admin_theme']['actions']['submit'] = array(
-    '#type' => 'submit',
-    '#value' => t('Save configuration'),
-  );
-  return $form;
-}
-
-/**
- * Process system_themes_admin_form form submissions.
- */
-function system_themes_admin_form_submit($form, &$form_state) {
-  drupal_set_message(t('The configuration options have been saved.'));
-  config('system.theme')->set('admin', $form_state['values']['admin_theme'])->save();
-}
-
-/**
  * Menu callback; Set the default theme.
  */
 function system_theme_default() {
@@ -938,26 +773,6 @@ function system_modules($form, $form_state = array()) {
 }
 
 /**
- * Array sorting callback; sorts modules or themes by their name.
- */
-function system_sort_modules_by_info_name($a, $b) {
-  return strcasecmp($a->info['name'], $b->info['name']);
-}
-
-/**
- * Array sorting callback; sorts modules or themes by their name.
- */
-function system_sort_themes($a, $b) {
-  if ($a->is_default) {
-    return -1;
-  }
-  if ($b->is_default) {
-    return 1;
-  }
-  return strcasecmp($a->info['name'], $b->info['name']);
-}
-
-/**
  * Build a table row for the system modules page.
  */
 function _system_modules_build_row($info, $extra) {
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index 185827e..3268b16 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -686,16 +686,7 @@ function system_menu() {
     'file' => 'system.admin.inc',
   );
   // Appearance.
-  $items['admin/appearance'] = array(
-    'title' => 'Appearance',
-    'description' => 'Select and configure your themes.',
-    'page callback' => 'system_themes_page',
-    'access arguments' => array('administer themes'),
-    'position' => 'left',
-    'weight' => -6,
-    'file' => 'system.admin.inc',
-  );
-  $items['admin/appearance/list'] = array(
+    $items['admin/appearance/list'] = array(
     'title' => 'List',
     'description' => 'Select and configure your theme',
     'type' => MENU_DEFAULT_LOCAL_TASK,
@@ -3833,3 +3824,60 @@ function country_get_list() {
   drupal_alter('countries', $countries);
   return $countries;
 }
+
+/**
+ * Form to select the administration theme.
+ *
+ * @ingroup forms
+ * @see system_themes_admin_form_submit()
+ */
+function system_themes_admin_form($form, &$form_state, $theme_options) {
+  // Administration theme settings.
+  $form['admin_theme'] = array(
+    '#type' => 'details',
+    '#title' => t('Administration theme'),
+  );
+  $form['admin_theme']['admin_theme'] = array(
+    '#type' => 'select',
+    '#options' => array(0 => t('Default theme')) + $theme_options,
+    '#title' => t('Administration theme'),
+    '#description' => t('Choose "Default theme" to always use the same theme as the rest of the site.'),
+    '#default_value' => config('system.theme')->get('admin'),
+  );
+  $form['admin_theme']['actions'] = array('#type' => 'actions');
+  $form['admin_theme']['actions']['submit'] = array(
+    '#type' => 'submit',
+    '#value' => t('Save configuration'),
+  );
+  return $form;
+}
+
+/**
+ * Process system_themes_admin_form form submissions.
+ */
+function system_themes_admin_form_submit($form, &$form_state) {
+  drupal_set_message(t('The configuration options have been saved.'));
+  config('system.theme')->set('admin', $form_state['values']['admin_theme'])->save();
+}
+
+/**
+ * Array sorting callback; sorts modules or themes by their name.
+ */
+function system_sort_modules_by_info_name($a, $b) {
+  return strcasecmp($a->info['name'], $b->info['name']);
+}
+
+/**
+ * Array sorting callback; sorts modules or themes by their name.
+ */
+function system_sort_themes($a, $b) {
+  if ($a->is_default) {
+    return -1;
+  }
+  if ($b->is_default) {
+    return 1;
+  }
+  return strcasecmp($a->info['name'], $b->info['name']);
+}
+
+
diff --git a/core/modules/system/system.routing.yml b/core/modules/system/system.routing.yml
index 6f0e7f5..42e3fe5 100644
--- a/core/modules/system/system.routing.yml
+++ b/core/modules/system/system.routing.yml
@@ -137,3 +137,10 @@ system_php:
   requirements:
     _permission: 'administer site configuration'
 
+system_themes_page:
+  pattern: '/admin/appearance'
+  defaults:
+    _controller: 'Drupal\system\Controller\ThemeController::getAllThemes'
+  requirements:
+    _permission: 'administer themes'
+