diff --git a/src/Bundle/ChillActivityBundle/Timeline/TimelineActivityProvider.php b/src/Bundle/ChillActivityBundle/Timeline/TimelineActivityProvider.php
index ff1d9ffb3..a4dbdfad3 100644
--- a/src/Bundle/ChillActivityBundle/Timeline/TimelineActivityProvider.php
+++ b/src/Bundle/ChillActivityBundle/Timeline/TimelineActivityProvider.php
@@ -101,7 +101,7 @@ class TimelineActivityProvider implements TimelineProviderInterface
         $metadataActivity = $this->em->getClassMetadata(Activity::class);
 
         [$where, $parameters] =  $this->getWhereClauseForPerson($args['person']);
-        dump($where, $parameters);
+        
         return TimelineSingleQuery::fromArray([
            'id' => $metadataActivity->getTableName()
                 .'.'.$metadataActivity->getColumnName('id'),
@@ -119,49 +119,33 @@ class TimelineActivityProvider implements TimelineProviderInterface
         $parameters = [];
         $metadataActivity = $this->em->getClassMetadata('ChillActivityBundle:Activity');
         $associationMapping = $metadataActivity->getAssociationMapping('person');
-        $metadataPerson = $this->em->getClassMetadata('ChillPersonBundle:Person');
-
         $role = new Role('CHILL_ACTIVITY_SEE');
-        $reachableCenters = $this->helper->getReachableCenters($this->user, 
-                $role);
-        
-        if (count($reachableCenters) === 0) {
-            return 'FALSE = TRUE';
-        }
-        
-        // we start with activities having the person_id linked to person 
-        // (currently only context "person" is supported)
-        $whereClause = sprintf(' {activity.person_id} = ? ');
+        $reachableScopes =  $this->helper->getReachableScopes($this->user,
+            $role, $person->getCenter());
+        $whereClause = sprintf(' {activity.person_id} = ? AND {activity.scope_id} IN ({scopes_ids}) ');
+        $scopes_ids = [];
+
+        // first parameter: activity.person_id 
         $parameters[] = $person->getId();
-        
-        // we add acl (reachable center and scopes)
-        $centerAndScopeClauses = [];
-        foreach ($reachableCenters as $center) {
-            $parameters[] = $center->getId();
-            $scopes_ids = [];
-            $reachableScopes =  $this->helper->getReachableScopes($this->user, $role, $person->getCenter());
-            foreach ($reachableScopes as $scope) {
-                $scopes_ids[] = '?'; 
-                $parameters[] = $scope->getId();
+
+        // loop on reachable scopes 
+        foreach ($reachableScopes as $scope) {
+            if (\in_array($scope->getId(), $scopes_ids)) {
+                continue;
             }
-            $centerAndScopeClauses[] = \strtr(
-                '( {person.center_id} = ? AND {activity.scope_id} IN ({scopes_ids})) ',
-                [
-                    '{scopes_ids}' => \implode(", ", $scopes_ids)
-                ]
-            );
+            $scopes_ids[] = '?'; 
+            $parameters[] = $scope->getId();
         }
-        $whereClause .= ' AND ('.\implode(' OR ', $centerAndScopeClauses).' ) ';
 
         return [
             \strtr(
                 $whereClause,
                 [
                     '{activity.person_id}' => $associationMapping['joinColumns'][0]['name'],
-                    '{person.center_id}' => $metadataPerson->getTableName().'.'.
-                        $metadataPerson->getAssociationMapping('center')['joinColumns'][0]['name'],
                     '{activity.scope_id}' => $metadataActivity->getTableName().'.'.
                         $metadataActivity->getAssociationMapping('scope')['joinColumns'][0]['name'],
+                    '{scopes_ids}' => \implode(", ", $scopes_ids)
+,
                 ]
             ),
             $parameters
diff --git a/src/Bundle/ChillMainBundle/Timeline/TimelineBuilder.php b/src/Bundle/ChillMainBundle/Timeline/TimelineBuilder.php
index bd1a4cc1a..de2ae9975 100644
--- a/src/Bundle/ChillMainBundle/Timeline/TimelineBuilder.php
+++ b/src/Bundle/ChillMainBundle/Timeline/TimelineBuilder.php
@@ -28,8 +28,6 @@ use Doctrine\ORM\NativeQuery;
 
 /**
  * Build timeline
- *
- * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
 class TimelineBuilder implements ContainerAwareInterface
 {
diff --git a/src/Bundle/ChillMainBundle/Timeline/TimelineSingleQuery.php b/src/Bundle/ChillMainBundle/Timeline/TimelineSingleQuery.php
index cf8dc085e..e7e456a80 100644
--- a/src/Bundle/ChillMainBundle/Timeline/TimelineSingleQuery.php
+++ b/src/Bundle/ChillMainBundle/Timeline/TimelineSingleQuery.php
@@ -38,12 +38,12 @@ class TimelineSingleQuery
     public static function fromArray(array $a)
     {
         return new TimelineSingleQuery(
-            $a['id'],
-            $a['date'],
-            $a['type'] ?? $a['key'],
-            $a['FROM'] ?? $a['from'],
-            $a['WHERE'] ?? $a['where'],
-            $a['parameters']);
+            $a['id'] ?? null,
+            $a['date'] ?? null,
+            $a['type'] ?? $a['key'] ?? null,
+            $a['FROM'] ?? $a['from'] ?? null,
+            $a['WHERE'] ?? $a['where'] ?? null,
+            $a['parameters'] ?? null);
     }
 
     public function getId(): string
diff --git a/src/Bundle/ChillPersonBundle/Timeline/AbstractTimelineAccompanyingPeriod.php b/src/Bundle/ChillPersonBundle/Timeline/AbstractTimelineAccompanyingPeriod.php
index 6b5b0cfd8..d5778280a 100644
--- a/src/Bundle/ChillPersonBundle/Timeline/AbstractTimelineAccompanyingPeriod.php
+++ b/src/Bundle/ChillPersonBundle/Timeline/AbstractTimelineAccompanyingPeriod.php
@@ -28,6 +28,7 @@ use Chill\MainBundle\Entity\Center;
 use Chill\PersonBundle\Security\Authorization\PersonVoter;
 use Symfony\Component\Security\Core\Security;
 use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
+use Chill\MainBundle\Timeline\TimelineSingleQuery;
 
 /**
  * Provide method to build timeline for accompanying periods
@@ -88,14 +89,16 @@ abstract class AbstractTimelineAccompanyingPeriod implements TimelineProviderInt
         }
         
         $metadata = $this->em
-                ->getClassMetadata(AccompanyingPeriodParticipation::class)
+                ->getClassMetadata(AccompanyingPeriod::class)
                 ;
-        
-        return array(
+        [$where, $parameters] = $this->buildWhereClause($context, $args);
+
+        return TimelineSingleQuery::fromArray([
             'id' => "{$metadata->getTableName()}.{$metadata->getColumnName('id')}",
             'FROM' => $this->buildFromClause($context),
-            'WHERE' => $this->buildWhereClause($context, $args)
-        );
+            'WHERE' => $where,
+            'parameters' => $parameters
+        ]);
     }
 
     private function buildFromClause($context)
@@ -130,9 +133,9 @@ abstract class AbstractTimelineAccompanyingPeriod implements TimelineProviderInt
         $join = $participation->getAssociationMapping('person')['joinColumns'][0];
         $person = $this->em->getClassMetadata(Person::class);
         $joinCenter = $person->getAssociationMapping('center')['joinColumns'][0];
-        $allowedCenters = $this->authorizationHelper->filterReachableCenters($this->security->getUser(), $args['centers'], PersonVoter::SEE);
 
         if ($context === 'center') {
+            $allowedCenters = $this->authorizationHelper->filterReachableCenters($this->security->getUser(), $args['centers'], PersonVoter::SEE);
             $params = [];
             $questionMarks = [];
             $query = "{$person->getTableName()}.{$joinCenter['name']} IN (";
diff --git a/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodClosing.php b/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodClosing.php
index 2e3d953fa..c873b6405 100644
--- a/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodClosing.php
+++ b/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodClosing.php
@@ -25,8 +25,6 @@ use Chill\PersonBundle\Entity\AccompanyingPeriod;
 
 /**
  * Provide information for opening periods to timeline
- *
- * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
 class TimelineAccompanyingPeriodClosing extends AbstractTimelineAccompanyingPeriod
 {
@@ -49,13 +47,15 @@ class TimelineAccompanyingPeriodClosing extends AbstractTimelineAccompanyingPeri
         $metadata = $this->em
                     ->getClassMetadata(AccompanyingPeriod::class);
         
-        $data = $this->basicFetchQuery($context, $args);
-        
-        $data['type'] = 'accompanying_period_closing';
-        $data['date'] = $metadata->getColumnName('closingDate');
-        $data['WHERE'] = $this->buildWhereClause($context, $args);
+        $query = $this->basicFetchQuery($context, $args);
+        [$where, $parameters] = $this->buildWhereClause($context, $args);
+        $query->setKey('accompanying_period_closing')
+            ->setDate($metadata->getColumnName('closingDate'))
+            ->setWhere($where)
+            ->setParameters($parameters)
+            ;
             
-        return $data;
+        return $query;
     }
 
     protected function buildWhereClause($context, array $args): array
diff --git a/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodOpening.php b/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodOpening.php
index 5d3222789..04b3df5b8 100644
--- a/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodOpening.php
+++ b/src/Bundle/ChillPersonBundle/Timeline/TimelineAccompanyingPeriodOpening.php
@@ -47,12 +47,12 @@ class TimelineAccompanyingPeriodOpening extends AbstractTimelineAccompanyingPeri
         $metadata = $this->em
                     ->getClassMetadata(AccompanyingPeriod::class);
         
-        $data = $this->basicFetchQuery($context, $args);
+        $query = $this->basicFetchQuery($context, $args);
         
-        $data['type'] = 'accompanying_period_opening';
-        $data['date'] = $metadata->getColumnName('openingDate');
+        $query->setKey('accompanying_period_opening')
+            ->setDate($metadata->getColumnName('openingDate'));
         
-        return $data;
+        return $query;
     }
 
     /**