diff --git a/includes/activitypub/transmogrify/class-gatherpress.php b/includes/activitypub/transmogrify/class-gatherpress.php
new file mode 100644
index 0000000..b94efb5
--- /dev/null
+++ b/includes/activitypub/transmogrify/class-gatherpress.php
@@ -0,0 +1,61 @@
+<?php
+/**
+ * ActivityPub Transmogrify for the GatherPress event plugin.
+ *
+ * Handles converting incoming external ActivityPub events to GatherPress Events.
+ *
+ * @package Event_Bridge_For_ActivityPub
+ * @since 1.0.0
+ * @license AGPL-3.0-or-later
+ */
+
+namespace Event_Bridge_For_ActivityPub\Activitypub\Transmogrify;
+
+use Activitypub\Activity\Extended_Object\Event;
+use Activitypub\Activity\Extended_Object\Place;
+
+// Exit if accessed directly.
+defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
+
+use GatherPress\Core\Event as GatherPress_Event;
+
+/**
+ * ActivityPub Transmogrify for the GatherPress event plugin.
+ *
+ * Handles converting incoming external ActivityPub events to GatherPress Events.
+ *
+ * @since 1.0.0
+ */
+class GatherPress {
+	/**
+	 * The current GatherPress Event object.
+	 *
+	 * @var Event
+	 */
+	protected $activitypub_event;
+
+	/**
+	 * Extend the constructor, to also set the GatherPress objects.
+	 *
+	 * This is a special class object form The Events Calendar which
+	 * has a lot of useful functions, we make use of our getter functions.
+	 *
+	 * @param array $activitypub_event The ActivityPub Event as associative array.
+	 */
+	public function __construct( $activitypub_event ) {
+		$activitypub_event = Event::init_from_array( $activitypub_event );
+
+		if ( is_wp_error( $activitypub_event ) ) {
+			return;
+		}
+
+		$this->activitypub_event = $activitypub_event;
+	}
+
+	/**
+	 * Save the ActivityPub event object as GatherPress Event.
+	 */
+	public function save() {
+		// Insert GatherPress Event here.
+	}
+}
diff --git a/includes/admin/class-settings-page.php b/includes/admin/class-settings-page.php
index c49602b..2ad8999 100644
--- a/includes/admin/class-settings-page.php
+++ b/includes/admin/class-settings-page.php
@@ -162,12 +162,11 @@ class Settings_Page {
 			$tab = sanitize_key( $_GET['tab'] );
 		}
 
+		$plugin_setup  = Setup::get_instance();
+		$event_plugins = $plugin_setup->get_active_event_plugins();
+
 		switch ( $tab ) {
 			case 'settings':
-				$plugin_setup = Setup::get_instance();
-
-				$event_plugins = $plugin_setup->get_active_event_plugins();
-
 				$event_terms = array();
 
 				foreach ( $event_plugins as $event_plugin ) {
@@ -182,9 +181,20 @@ class Settings_Page {
 				\load_template( EVENT_BRIDGE_FOR_ACTIVITYPUB_PLUGIN_DIR . 'templates/settings.php', true, $args );
 				break;
 			case 'event-sources':
+				$supports_event_sources = array();
+
+				foreach ( $event_plugins as $event_plugin ) {
+					if ( $event_plugin->supports_event_sources() ) {
+						$supports_event_sources[ $event_plugin::class ] = $event_plugin->get_plugin_name();
+					}
+				}
+				$args = array(
+					'supports_event_sources' => $supports_event_sources,
+				);
+
 				wp_enqueue_script( 'thickbox' );
 				wp_enqueue_style( 'thickbox' );
-				\load_template( EVENT_BRIDGE_FOR_ACTIVITYPUB_PLUGIN_DIR . 'templates/event-sources.php', true );
+				\load_template( EVENT_BRIDGE_FOR_ACTIVITYPUB_PLUGIN_DIR . 'templates/event-sources.php', true, $args );
 				break;
 			case 'welcome':
 			default:
diff --git a/includes/class-settings.php b/includes/class-settings.php
index b895e2a..c74dddc 100644
--- a/includes/class-settings.php
+++ b/includes/class-settings.php
@@ -103,6 +103,42 @@ class Settings {
 				'default'     => 1,
 			)
 		);
+
+		\register_setting(
+			'event-bridge-for-activitypub',
+			'event_bridge_for_activitypub_plugin_used_for_event_source_feature',
+			array(
+				'type'              => 'array',
+				'description'       => \__( 'Define which plugin/integration is used for the event sources feature', 'event-bridge-for-activitypub' ),
+				'default'           => array(),
+				'sanitize_callback' => array( self::class, 'sanitize_plugin_used_for_event_sources' ),
+			)
+		);
+	}
+
+	/**
+	 * Sanitize the option which event plugin.
+	 *
+	 * @param string $plugin The setting.
+	 * @return string
+	 */
+	public static function sanitize_plugin_used_for_event_sources( $plugin ) {
+		if ( ! is_string( $plugin ) ) {
+			return '';
+		}
+		$setup                = Setup::get_instance();
+		$active_event_plugins = $setup->get_active_event_plugins();
+
+		$valid_options = array();
+		foreach ( $active_event_plugins as $active_event_plugin ) {
+			if ( $active_event_plugin->supports_event_sources() ) {
+				$valid_options[] = $active_event_plugin::class;
+			}
+		}
+		if ( in_array( $plugin, $valid_options, true ) ) {
+			return $plugin;
+		}
+		return '';
 	}
 
 	/**
diff --git a/includes/class-setup.php b/includes/class-setup.php
index 49ac81c..68f2f49 100644
--- a/includes/class-setup.php
+++ b/includes/class-setup.php
@@ -179,8 +179,6 @@ class Setup {
 			array( Settings_Page::class, 'settings_link' )
 		);
 
-		add_action( 'activitypub_register_handlers', array( Handler::class, 'register_activitypub_handlers' ) );
-
 		// If we don't have any active event plugins, or the ActivityPub plugin is not enabled, abort here.
 		if ( empty( $this->active_event_plugins ) || ! $this->activitypub_plugin_is_active ) {
 			return;
diff --git a/includes/integrations/class-event-plugin.php b/includes/integrations/class-event-plugin.php
index aba3d22..756926f 100644
--- a/includes/integrations/class-event-plugin.php
+++ b/includes/integrations/class-event-plugin.php
@@ -54,6 +54,15 @@ abstract class Event_Plugin {
 		return array();
 	}
 
+	/**
+	 * By default event sources are not supported by an event plugin integration.
+	 *
+	 * @return bool True if event sources are supported.
+	 */
+	public static function supports_event_sources(): bool {
+		return false;
+	}
+
 	/**
 	 * Get the plugins name from the main plugin-file's top-level-file-comment.
 	 */
diff --git a/includes/integrations/class-gatherpress.php b/includes/integrations/class-gatherpress.php
index 57cd222..0efb319 100644
--- a/includes/integrations/class-gatherpress.php
+++ b/includes/integrations/class-gatherpress.php
@@ -66,4 +66,13 @@ final class GatherPress extends Event_Plugin {
 	public static function get_event_category_taxonomy(): string {
 		return class_exists( '\GatherPress\Core\Topic' ) ? \GatherPress\Core\Topic::TAXONOMY : 'gatherpress_topic';
 	}
+
+	/**
+	 * GatherPress supports the Event Sources feature.
+	 *
+	 * @return bool True if event sources are supported.
+	 */
+	public static function supports_event_sources(): bool {
+		return true;
+	}
 }
diff --git a/templates/event-sources.php b/templates/event-sources.php
index 47e2f22..cdfe441 100644
--- a/templates/event-sources.php
+++ b/templates/event-sources.php
@@ -18,12 +18,19 @@ defined( 'ABSPATH' ) || exit; // @codeCoverageIgnore
 	)
 );
 
+if ( ! isset( $args ) || ! array_key_exists( 'supports_event_sources', $args ) ) {
+	return;
+}
+
+if ( ! current_user_can( 'manage_options' ) ) {
+	return;
+}
 
 $table = new \Event_Bridge_For_ActivityPub\Table\Event_Sources();
 ?>
 
 <div class="event-bridge-for-activitypub-settings event-bridge-for-activitypub-settings-page hide-if-no-js">
-
+	<?php var_dump( $args['supports_event_sources'] ); ?>
 	<div class="box">
 		<h2> <?php esc_html_e( 'Federated event sources', 'event-bridge-for-activitypub' ); ?> </h2>
 		<p> <?php esc_html_e( 'Here you can add any Fediverse Account.', 'event-bridge-for-activitypub' ); ?> </p>