diff --git a/docs/generate-repo-descriptions.php b/docs/generate-repo-descriptions.php
index 4988cd3ac..1861170ec 100644
--- a/docs/generate-repo-descriptions.php
+++ b/docs/generate-repo-descriptions.php
@@ -63,9 +63,6 @@ $repos = [
             [
                 'name' => 'get_core_description_metadatum',
             ],
-            [
-                'name' => 'get_core_author_metadatum',
-            ],
             [
                 'name' => 'fetch_all_metadatum_values',
             ],
diff --git a/src/classes/entities/class-tainacan-collection.php b/src/classes/entities/class-tainacan-collection.php
index b9cbb99f0..0848a34c8 100644
--- a/src/classes/entities/class-tainacan-collection.php
+++ b/src/classes/entities/class-tainacan-collection.php
@@ -494,7 +494,7 @@ class Collection extends Entity {
 	}
 
 	/**
-	 * Get the two core metadata of the collection (title, description and author)
+	 * Get the two core metadata of the collection (title and description)
 	 *
 	 * @return array[\Tainacan\Entities\Metadatum]
 	 */
@@ -527,17 +527,6 @@ class Collection extends Entity {
 		return $repo->get_core_description_metadatum($this);
 	}
 
-	/**
-	 * Get the Core Author Metadatum of the collection
-	 *
-	 * @return array[\Tainacan\Entities\Metadatum]
-	 */
-	function get_core_author_metadatum() {
-		$repo = \Tainacan\Repositories\Metadata::get_instance();
-
-		return $repo->get_core_author_metadatum($this);
-	}
-
 	/**
 	 * Checks if comments are allowed for the current Collection.
 	 * @return string "open"|"closed"
diff --git a/src/classes/entities/class-tainacan-item.php b/src/classes/entities/class-tainacan-item.php
index dc5712ba7..494a542fb 100644
--- a/src/classes/entities/class-tainacan-item.php
+++ b/src/classes/entities/class-tainacan-item.php
@@ -384,17 +384,6 @@ class Item extends Entity {
 	    $this->set_mapped_property('comment_status', $value);
 	}
 
-	/**
-	 * Define the author id
-	 *
-	 * @param [integer] $value
-	 *
-	 * @return void
-	 */
-	function set_author_id( $value ) {
-		$this->set_mapped_property( 'author_id', $value );
-	}
-
 	/**
 	 *
 	 * {@inheritDoc}
diff --git a/src/classes/mappers/class-tainacan-dublin-core.php b/src/classes/mappers/class-tainacan-dublin-core.php
index 08beb6716..6563765ae 100644
--- a/src/classes/mappers/class-tainacan-dublin-core.php
+++ b/src/classes/mappers/class-tainacan-dublin-core.php
@@ -25,7 +25,6 @@ class Dublin_Core extends Mapper {
 		],
 		'dc:creator' => [
 			'label' => 'Creator',
-			'core_metadatum' => 'author'
 		],
 		'dc:date' => [
 			'label' => 'Date',
diff --git a/src/classes/repositories/class-tainacan-collections.php b/src/classes/repositories/class-tainacan-collections.php
index aaae01c57..2d556dfa5 100644
--- a/src/classes/repositories/class-tainacan-collections.php
+++ b/src/classes/repositories/class-tainacan-collections.php
@@ -348,7 +348,6 @@ class Collections extends Repository {
 		$this->old_collection       = $this->fetch( $collection->get_id() );
 		$this->old_core_title       = $collection->get_core_title_metadatum();
 		$this->old_core_description = $collection->get_core_description_metadatum();
-		$this->old_core_author      = $collection->get_core_author_metadatum();
 
 
 	}
@@ -361,10 +360,9 @@ class Collections extends Repository {
 		if ( $this->old_collection instanceof Entities\Collection &&
 			$this->old_collection->get_parent() != $collection->get_parent() &&
 			$this->old_core_title instanceof Entities\Metadatum &&
-			$this->old_core_description instanceof Entities\Metadatum && 
-			$this->old_core_author instanceof Entities\Metadatum
+			$this->old_core_description instanceof Entities\Metadatum
 		) {
-			$Tainacan_Metadata->maybe_update_core_metadata_meta_keys( $collection, $this->old_collection, $this->old_core_title, $this->old_core_description, $this->old_core_author);
+			$Tainacan_Metadata->maybe_update_core_metadata_meta_keys( $collection, $this->old_collection, $this->old_core_title, $this->old_core_description );
 		}
 	}
 
diff --git a/src/classes/repositories/class-tainacan-metadata.php b/src/classes/repositories/class-tainacan-metadata.php
index a896d3df7..415b6ffe8 100644
--- a/src/classes/repositories/class-tainacan-metadata.php
+++ b/src/classes/repositories/class-tainacan-metadata.php
@@ -19,8 +19,7 @@ class Metadata extends Repository {
 
 	public $core_metadata = [
 		'Tainacan\Metadata_Types\Core_Title',
-		'Tainacan\Metadata_Types\Core_Description',
-		'Tainacan\Metadata_Types\Core_Author'
+		'Tainacan\Metadata_Types\Core_Description'
 	];
 
 	private static $instance = null;
@@ -666,7 +665,7 @@ class Metadata extends Repository {
 	 * @return void
 	 * @throws \Exception
 	 */
-	public function maybe_update_core_metadata_meta_keys( Entities\Collection $collection_new, Entities\Collection $collection_old, Entities\Metadatum $old_title_metadatum, Entities\Metadatum $old_description_metadatum, Entities\Metadatum $old_author_metadatum ) {
+	public function maybe_update_core_metadata_meta_keys( Entities\Collection $collection_new, Entities\Collection $collection_old, Entities\Metadatum $old_title_metadatum, Entities\Metadatum $old_description_metadatum ) {
 
 		global $wpdb;
 
@@ -678,13 +677,10 @@ class Metadata extends Repository {
 			wp_delete_post( $old_description_metadatum->get_id(), true );
 			update_post_meta( $old_title_metadatum->get_id(), 'metadata_type', 'to_delete', $old_title_metadatum->get_metadata_type() );
 			wp_delete_post( $old_title_metadatum->get_id(), true );
-			update_post_meta( $old_author_metadatum->get_id(), 'metadata_type', 'to_delete', $old_author_metadatum->get_metadata_type() );
-			wp_delete_post( $old_author_metadatum->get_id(), true );
 		}
 
 		$new_title_metadatum       = $collection_new->get_core_title_metadatum();
 		$new_description_metadatum = $collection_new->get_core_description_metadatum();
-		$new_author_metadatum       = $collection_new->get_core_author_metadatum();
 
 		$sql_statement = $wpdb->prepare(
 			"UPDATE $wpdb->postmeta
@@ -710,18 +706,6 @@ class Metadata extends Repository {
 
 		$res = $wpdb->query( $sql_statement );
 
-		$sql_statement = $wpdb->prepare(
-			"UPDATE $wpdb->postmeta
-				SET meta_key = %s
-				WHERE meta_key = %s AND post_id IN (
-				SELECT ID
-				FROM $wpdb->posts
-				WHERE post_type = %s
-			)", $new_author_metadatum->get_id(), $old_author_metadatum->get_id(), $item_post_type
-		);
-
-		$res = $wpdb->query( $sql_statement );
-
 		wp_cache_flush();
 
 	}
@@ -749,14 +733,6 @@ class Metadata extends Repository {
 				'status'          => 'publish',
 				'display'		  => 'yes',
 			],
-			'core_author'       => [
-				'name'            => 'Author',
-				'description'     => 'Author',
-				'collection_id'   => $collection->get_id(),
-				'metadata_type'   => 'Tainacan\Metadata_Types\Core_Author',
-				'status'          => 'private',
-				'display'		  => 'no',
-			]
 		];
 
 	}
@@ -920,32 +896,6 @@ class Metadata extends Repository {
 		return false;
 	}
 
-	/**
-	 * Get the Core Author Metadatum for a collection
-	 *
-	 * @param Entities\Collection $collection
-	 *
-	 * @return \Tainacan\Entities\Metadatum The Core Author Metadatum
-	 * @throws \Exception
-	 */
-	public function get_core_author_metadatum( Entities\Collection $collection ) {
-
-		$results = $this->fetch_by_collection( $collection, [
-			'meta_query'     => [
-				[
-					'key'   => 'metadata_type',
-					'value' => 'Tainacan\Metadata_Types\Core_Author',
-				]
-			],
-			'posts_per_page' => 1
-		] );
-
-		if ( is_array( $results ) && sizeof( $results ) == 1 && $results[0] instanceof \Tainacan\Entities\Metadatum ) {
-			return $results[0];
-		}
-
-		return false;
-	}
 
 	/**
 	 * create a metadatum entity and insert by an associative array ( attribute => value )
diff --git a/src/views/admin/components/metadata-types/core-author/class-tainacan-core-author.php b/src/views/admin/components/metadata-types/core-author/class-tainacan-core-author.php
deleted file mode 100644
index e75de85c9..000000000
--- a/src/views/admin/components/metadata-types/core-author/class-tainacan-core-author.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php
-
-namespace Tainacan\Metadata_Types;
-
-use Tainacan\Entities\Metadatum;
-
-
-defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
-
-/**
- * Class TainacanMetadatumType
- */
-class Core_Author extends Metadata_Type {
-
-	function __construct(){
-		// call metadatum type constructor
-		parent::__construct();
-		$this->set_primitive_type('user');
-		$this->set_core(true);
-		$this->set_related_mapped_prop('author_id');
-		$this->set_component('tainacan-author');
-		$this->set_name( __('Core Author', 'tainacan') );
-		$this->set_description( __('The "Core Author" is a compulsory metadata automatically created for all collections by default.', 'tainacan') );
-	}
-
-	/**
-	 * generate the metadata for this metadatum type
-	 */
-	public function form(){
-
-	}
-	
-	/**
-	 * Core author metadatum type is stored as the item author
-	 *
-	 * Lets validate it as the item title
-	 *
-	 * @param  TainacanEntitiesItem_Metadata_Entity $item_metadata
-	 * @return bool Valid or not
-	 *
-	 * Quarantine - Core metadata should be validated as any other metadata
-	 * and item title is no longer mandatory    
-	 * public function validate(\Tainacan\Entities\Item_Metadata_Entity $item_metadata) { }
-	 */
-
-	public function validate_options( Metadatum $metadatum ) {
-		if ( !in_array($metadatum->get_status(), apply_filters('tainacan-status-require-validation', ['publish','future','private'])) )
-			return true;
-
-		if ( $metadatum->get_multiple() != 'no') {
-			return ['multiple' => __('Core Metadata can not accept multiple values', 'tainacan')];
-		}
-
-		if ($metadatum->get_required() != 'no') {
-			return ['multiple' => __('Core Author Metadata is required', 'tainacan')];
-		}
-
-		return true;
-	}
-
-	/**
-	 * Get the value as a HTML string
-	 * @return string
-	 */
-	public function get_value_as_html(\Tainacan\Entities\Item_Metadata_Entity $item_metadata) {
-		$value = $item_metadata->get_value();
-		$name = get_the_author_meta( 'display_name', $value );
-		return apply_filters("tainacan-item-get-author-name", $name, $this);
-	}
-	
-}
\ No newline at end of file
diff --git a/src/views/admin/components/metadata-types/metadata-type-helper/class-tainacan-metadata-type-helper.php b/src/views/admin/components/metadata-types/metadata-type-helper/class-tainacan-metadata-type-helper.php
index 601bdfe6b..f073f36da 100644
--- a/src/views/admin/components/metadata-types/metadata-type-helper/class-tainacan-metadata-type-helper.php
+++ b/src/views/admin/components/metadata-types/metadata-type-helper/class-tainacan-metadata-type-helper.php
@@ -40,6 +40,7 @@ class Metadata_Type_Helper {
 		$this->Tainacan_Metadata->register_metadata_type('Tainacan\Metadata_Types\Relationship');
 		$this->Tainacan_Metadata->register_metadata_type('Tainacan\Metadata_Types\Taxonomy');
 		$this->Tainacan_Metadata->register_metadata_type('Tainacan\Metadata_Types\Compound');
+		$this->Tainacan_Metadata->register_metadata_type('Tainacan\Metadata_Types\User');
 
 		// the priority should see less than on function 
 		// `load_admin_page()` of class `Admin` in file /src/views/class-tainacan-admin.php
diff --git a/src/views/admin/components/metadata-types/core-author/Author.vue b/src/views/admin/components/metadata-types/user/User.vue
similarity index 98%
rename from src/views/admin/components/metadata-types/core-author/Author.vue
rename to src/views/admin/components/metadata-types/user/User.vue
index 9c094a688..4868f8ba4 100644
--- a/src/views/admin/components/metadata-types/core-author/Author.vue
+++ b/src/views/admin/components/metadata-types/user/User.vue
@@ -45,6 +45,7 @@ export default {
     data() {
         return {
             users: [],
+            defaultAuthor: 'no',
             isLoadingCurrentUser: false,
             isFetchingUsers: false,
             userId: null,
diff --git a/src/views/admin/components/metadata-types/user/class-tainacan-user.php b/src/views/admin/components/metadata-types/user/class-tainacan-user.php
new file mode 100644
index 000000000..0d6b3ea2d
--- /dev/null
+++ b/src/views/admin/components/metadata-types/user/class-tainacan-user.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace Tainacan\Metadata_Types;
+
+use Tainacan\Entities\Metadatum;
+
+
+defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
+
+/**
+ * Class TainacanMetadatumType
+ */
+class User extends Metadata_Type {
+
+	function __construct(){
+		// call metadatum type constructor
+		parent::__construct();
+		$this->set_primitive_type('user');
+		$this->set_component('tainacan-user');
+		$this->set_name( __('User', 'tainacan') );
+		$this->set_description( __('A registered user on wordpress', 'tainacan') );
+		$this->set_preview_template('
+			<div>
+				<div class="control is-clearfix">
+					user
+				</div>
+			</div>
+		');
+	}
+
+	/**
+	 * generate the metadata for this metadatum type
+	 */
+	public function form() {
+
+	}
+
+	function user_exists($user) {
+		// if( !is_int($user) )
+		// 	return username_exists($user) !== false;
+
+    global $wpdb;
+    // Check cache:
+    if (wp_cache_get($user, 'users')) return true;
+    // Check database:
+		if ($wpdb->get_var($wpdb->prepare("SELECT EXISTS (SELECT 1 FROM $wpdb->users WHERE ID = %d)", $user)))
+			return true;
+		return false;
+	}
+	
+	/**
+	 * User metadatum type is stored as id of WP user 
+	 *
+	 * @param  TainacanEntitiesItem_Metadata_Entity $item_metadata
+	 * @return bool Valid or not
+	 * 
+	 */
+	public function validate(\Tainacan\Entities\Item_Metadata_Entity $item_metadata) {
+		$value = $item_metadata->get_value();
+		if ( is_array($values) ) {
+			foreach($values as $user) {
+				if ( !$this->user_exists($user) ) {
+					$this->add_error( sprintf(__('User does not exist %s.', 'tainacan'), $user ) );
+					return false;
+				}
+			}
+		} else {
+			if ( !$this->user_exists($value) ) {
+				$this->add_error( sprintf( __('User does not exist %s.', 'tainacan'), $user ) );
+				return false;
+			}
+		}
+		return true;
+	}
+
+	public function validate_options( Metadatum $metadatum ) {
+		if ( !in_array($metadatum->get_status(), apply_filters('tainacan-status-require-validation', ['publish','future','private'])) ) {
+			return true;
+		}
+
+		if ( empty( $this->get_option('default_author') ) || !in_array ( $this->get_option('default_author'), ['yes', 'no'] ) ) {
+			return ['default_author' => __('Invalid config default author','tainacan')];
+		}
+		return true;
+	}
+
+	/**
+	 * Get the value as a HTML string
+	 * @return string
+	 */
+	public function get_value_as_html(\Tainacan\Entities\Item_Metadata_Entity $item_metadata) {
+		$value = $item_metadata->get_value();
+		$name = get_the_author_meta( 'display_name', $value );
+		return apply_filters("tainacan-item-get-author-name", $name, $this);
+	}
+	
+}
\ No newline at end of file
diff --git a/src/views/admin/js/main.js b/src/views/admin/js/main.js
index 19dd9f5fa..9386edf94 100644
--- a/src/views/admin/js/main.js
+++ b/src/views/admin/js/main.js
@@ -20,7 +20,7 @@ import Date from '../components/metadata-types/date/Date.vue';
 import Relationship from '../components/metadata-types/relationship/Relationship.vue';
 import Taxonomy from '../components/metadata-types/taxonomy/Taxonomy.vue';
 import Compound from '../components/metadata-types/compound/Compound.vue';
-import Author from '../components/metadata-types/core-author/Author.vue';
+import User from '../components/metadata-types/user/User.vue';
 
 import FormRelationship from '../components/metadata-types/relationship/FormRelationship.vue';
 import FormTaxonomy from '../components/metadata-types/taxonomy/FormTaxonomy.vue';
@@ -95,7 +95,7 @@ Vue.component('tainacan-date', Date);
 Vue.component('tainacan-relationship', Relationship);
 Vue.component('tainacan-taxonomy', Taxonomy);
 Vue.component('tainacan-compound', Compound);
-Vue.component('tainacan-author', Author);
+Vue.component('tainacan-user', User);
 
 /* Metadata Option forms */
 Vue.component('tainacan-form-relationship', FormRelationship);
diff --git a/tests/test-api-items.php b/tests/test-api-items.php
index fa10aede5..8c83cb29f 100644
--- a/tests/test-api-items.php
+++ b/tests/test-api-items.php
@@ -380,7 +380,7 @@ class TAINACAN_REST_Items_Controller extends TAINACAN_UnitApiTestCase {
 		$data = $response->get_data()['items'];
 
 		$this->assertEquals( 2, sizeof($data) );
-		$this->assertEquals( 6, sizeof($data[0]['metadata']) );
+		$this->assertEquals( 5, sizeof($data[0]['metadata']) );
 
 		// Fetch only as admin
 		$request = new \WP_REST_Request(
diff --git a/tests/test-api-metadata.php b/tests/test-api-metadata.php
index 3d2d5e73d..06525444c 100644
--- a/tests/test-api-metadata.php
+++ b/tests/test-api-metadata.php
@@ -825,7 +825,7 @@ class TAINACAN_REST_Metadata_Controller extends TAINACAN_UnitApiTestCase {
 		$response = $this->server->dispatch($request);
 		$data = $response->get_data();
 
-		$this->assertEquals(5, count($data['metadata_order']));
+		$this->assertEquals(4, count($data['metadata_order']));
 
 		wp_logout();
 		wp_set_current_user(0);
diff --git a/tests/test-capabilities.php b/tests/test-capabilities.php
index d9db8b010..0c38b8d5a 100644
--- a/tests/test-capabilities.php
+++ b/tests/test-capabilities.php
@@ -510,17 +510,17 @@ class Capabilities extends TAINACAN_UnitTestCase {
 		$current_user = $this->subscriber2; // force update current user object with new capabilities
 
 		$meta = tainacan_metadata()->fetch_by_collection($this->public_collection);
-		$this->AssertEquals(6, sizeof($meta));
+		$this->AssertEquals(5, sizeof($meta));
 		$meta = tainacan_metadata()->fetch_ids_by_collection($this->public_collection);
-		$this->AssertEquals(6, sizeof($meta));
+		$this->AssertEquals(5, sizeof($meta));
 
 		$this->subscriber2->add_cap( 'tnc_rep_read_private_metadata' );
 		$current_user = $this->subscriber2; // force update current user object with new capabilities
 
 		$meta = tainacan_metadata()->fetch_by_collection($this->public_collection);
-		$this->AssertEquals(7, sizeof($meta));
+		$this->AssertEquals(6, sizeof($meta));
 		$meta = tainacan_metadata()->fetch_ids_by_collection($this->public_collection);
-		$this->AssertEquals(7, sizeof($meta));
+		$this->AssertEquals(6, sizeof($meta));
 
 
 	}
diff --git a/tests/test-core-metadatum-types.php b/tests/test-core-metadatum-types.php
index b82ffede8..c73c070e5 100644
--- a/tests/test-core-metadatum-types.php
+++ b/tests/test-core-metadatum-types.php
@@ -34,9 +34,6 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
         
         $metadatumDescription = $collection->get_core_description_metadatum();
 
-        $metadatumAuthor = $collection->get_core_author_metadatum();
-        
-        
         $i = $this->tainacan_entity_factory->create_entity(
            'item',
            array(
@@ -91,9 +88,6 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
        $this->assertEquals('changed description', $checkMeta[0]->get_description());
 
 
-       // author
-       $item_metadata = new \Tainacan\Entities\Item_Metadata_Entity($i, $metadatumAuthor);
-       
     }
 
     function test_validate_required_title() {
@@ -200,7 +194,7 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
         
         $core_metadata = $collection->get_core_metadata();
 
-        $this->assertEquals(3, sizeof($core_metadata));
+        $this->assertEquals(2, sizeof($core_metadata));
 
         $this->assertNotEquals('Tainacan\Metadata_Types\Text', $core_metadata[0]->get_metadata_type());
         $this->assertNotEquals('Tainacan\Metadata_Types\Text', $core_metadata[1]->get_metadata_type());
@@ -260,7 +254,6 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
 		    	'title'       => 'Son of son',
 		    	'description' => 'Desc of son of son',
                 'collection'  => $collection_son,
-                'author_id'   => get_current_user_id(),
 			    'status' => 'publish'
 		    ),
 		    true
@@ -278,13 +271,7 @@ class CoreMetadatumTypes extends TAINACAN_UnitTestCase {
 			'Desc of son of son'
 		);
 
-		$item_metadatum_author = $this->tainacan_item_metadata_factory->create_item_metadata(
-			$collection_son_item, 
-			$core_metadata_son[2],
-			get_current_user_id()
-		);
-
-	    $this->assertEquals($core_metadata_son[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
+        $this->assertEquals($core_metadata_son[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
 	    $this->assertEquals($core_metadata_son[1]->get_id(), $item_metadatum_title->get_metadatum()->get_id());
 
 	    $this->assertNotEquals($core_metadata_parent[0]->get_id(), $item_metadatum_desc->get_metadatum()->get_id());
diff --git a/tests/test-item-metadata.php b/tests/test-item-metadata.php
index abd2a1461..9badf85e3 100644
--- a/tests/test-item-metadata.php
+++ b/tests/test-item-metadata.php
@@ -240,7 +240,7 @@ class Item_Metadata extends TAINACAN_UnitTestCase {
         $this->assertTrue(is_array($item_metadatas));
 
         // notice for repository metadata
-        $this->assertEquals(4, sizeof($item_metadatas));
+        $this->assertEquals(3, sizeof($item_metadatas));
         //first 2 metadata are repository metadata
         $this->assertTrue( in_array('metadado', $names) );
         
diff --git a/tests/test-metadata.php b/tests/test-metadata.php
index a76841066..43a47d73b 100644
--- a/tests/test-metadata.php
+++ b/tests/test-metadata.php
@@ -165,8 +165,8 @@ class Metadata extends TAINACAN_UnitTestCase {
 		$retrieve_metadata_ids =  $Tainacan_Metadata->fetch_ids_by_collection( $collection_son, [] );
 
 		// should return 6
-		$this->assertEquals( 7, sizeof( $retrieve_metadata ) );
-		$this->assertEquals( 7, sizeof( $retrieve_metadata_ids ) );
+		$this->assertEquals( 6, sizeof( $retrieve_metadata ) );
+		$this->assertEquals( 6, sizeof( $retrieve_metadata_ids ) );
 	}
 
 	/**
@@ -197,7 +197,7 @@ class Metadata extends TAINACAN_UnitTestCase {
 	 */
 	function test_metadata_metadata_type(){
 		$Tainacan_Metadata = \Tainacan\Repositories\Metadata::get_instance();
-		$this->assertEquals( 8, sizeof( $Tainacan_Metadata->fetch_metadata_types() ) );
+		$this->assertEquals( 9, sizeof( $Tainacan_Metadata->fetch_metadata_types() ) );
 	}