diff --git a/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivity.php b/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivity.php
index de1ea97c2..ce32143f5 100644
--- a/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivity.php
+++ b/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivity.php
@@ -138,11 +138,15 @@ class LoadActivity extends AbstractFixture implements OrderedFixtureInterface, C
 
         foreach($persons as $person) {
             $activityNbr = rand(0,3);
+            $ref = 'activity_'.$person->getFullnameCanonical();
+
             for($i = 0; $i < $activityNbr; $i ++) {
-                print "Creating an activity type for  : ".$person."\n";
+                print "Creating an activity type for  : ".$person." (ref: ".$ref.")  \n";
                 $activity = $this->newRandomActivity($person);
                 $manager->persist($activity);
             }
+
+            $this->setReference($ref, $activity);
         }
         $manager->flush();
     }
diff --git a/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivityNotifications.php b/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivityNotifications.php
new file mode 100644
index 000000000..588b2b7e1
--- /dev/null
+++ b/src/Bundle/ChillActivityBundle/DataFixtures/ORM/LoadActivityNotifications.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Chill\ActivityBundle\DataFixtures\ORM;
+
+use Doctrine\Common\DataFixtures\AbstractFixture;
+use Doctrine\Common\DataFixtures\OrderedFixtureInterface;
+use Doctrine\Persistence\ObjectManager;
+use Symfony\Component\Intl\Intl;
+use Chill\MainBundle\Entity\Notification;
+use Chill\ActivityBundle\Entity\Activity;
+use Chill\MainBundle\DataFixtures\ORM\LoadAbstractNotificationsTrait;
+
+/**
+ * Load notififications into database
+ */
+class LoadActivityNotifications extends AbstractFixture implements OrderedFixtureInterface
+{
+    use LoadAbstractNotificationsTrait;
+
+    public function getOrder() {
+        return 16500;
+    }
+
+    public $notifs = [
+        [
+            'message' => 'Hello !',
+            'entityClass' => Activity::class,
+            'entityRef' => 'activity_gerard depardieu',
+            'sender' => 'center a_social',
+            'addressees' => [
+                'center a_administrative',
+                'center a_direction',
+                'multi_center'
+            ],
+        ]
+    ];
+
+
+}
diff --git a/src/Bundle/ChillMainBundle/DataFixtures/ORM/LoadAbstractNotificationsTrait.php b/src/Bundle/ChillMainBundle/DataFixtures/ORM/LoadAbstractNotificationsTrait.php
new file mode 100644
index 000000000..071f67497
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/DataFixtures/ORM/LoadAbstractNotificationsTrait.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace Chill\MainBundle\DataFixtures\ORM;
+
+use Doctrine\Common\DataFixtures\AbstractFixture;
+use Doctrine\Common\DataFixtures\OrderedFixtureInterface;
+use Doctrine\Persistence\ObjectManager;
+use Symfony\Component\Intl\Intl;
+use Chill\MainBundle\Entity\Notification;
+
+/**
+ * Load notififications into database
+ */
+trait LoadAbstractNotificationsTrait
+{
+    public function load(ObjectManager $manager)
+    {
+        foreach ($this->notifs as $notif) {
+            $entityId = $this->getReference($notif['entityRef'])->getId();
+
+            print('Adding notification for '.$notif['entityClass'].'(entity id:'.$entityId.")\n");
+
+            $newNotif = (new Notification())
+                ->setMessage($notif['message'])
+                ->setSender($this->getReference($notif['sender']))
+                ->setRelatedEntityClass($notif['entityClass'])
+                ->setRelatedEntityId($entityId)
+                ->setDate(new \DateTimeImmutable('now'))
+                ->setRead([])
+                ;
+
+            foreach ($notif['addressees'] as $addressee) {
+                $newNotif->addAddressee($this->getReference($addressee));
+            }
+
+            $manager->persist($newNotif);
+
+            $manager->flush();
+        }
+    }
+}
diff --git a/src/Bundle/ChillMainBundle/Entity/Notification.php b/src/Bundle/ChillMainBundle/Entity/Notification.php
new file mode 100644
index 000000000..092445c9b
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Entity/Notification.php
@@ -0,0 +1,187 @@
+<?php
+
+/*
+ * Copyright (C) 2021 Champs-Libres <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\MainBundle\Entity;
+
+use Chill\MainBundle\Entity\User;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+
+/**
+ * @ORM\Entity
+ * @ORM\Table(
+ *      name="chill_main_notification",
+ *      uniqueConstraints={
+ *          @ORM\UniqueConstraint(columns={"relatedEntityClass", "relatedEntityId"})
+ *      }
+ * )
+ */
+class Notification
+{
+    /**
+     * @ORM\Id
+     * @ORM\GeneratedValue
+     * @ORM\Column(type="integer")
+     */
+    private int $id;
+
+    /**
+     * @ORM\Column(type="text")
+     */
+    private string $message;
+
+    /**
+     * @ORM\Column(type="datetime_immutable")
+     */
+    private \DateTimeImmutable $date;
+
+    /**
+     * @ORM\ManyToOne(targetEntity=User::class)
+     * @ORM\JoinColumn(nullable=false)
+     */
+    private User $sender;
+
+    /**
+     * @ORM\ManyToMany(targetEntity=User::class)
+     * @ORM\JoinTable(name="chill_main_notification_addresses_user")
+     */
+    private Collection $addressees;
+
+    /**
+     * @ORM\Column(type="string", length=255)
+     */
+    private string $relatedEntityClass;
+
+    /**
+     * @ORM\Column(type="integer")
+     */
+    private int $relatedEntityId;
+
+    /**
+     * @ORM\Column(type="json")
+     */
+    private array $read;
+
+    public function __construct()
+    {
+        $this->addressees = new ArrayCollection();
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getMessage(): ?string
+    {
+        return $this->message;
+    }
+
+    public function setMessage(string $message): self
+    {
+        $this->message = $message;
+
+        return $this;
+    }
+
+    public function getDate(): ?\DateTimeImmutable
+    {
+        return $this->date;
+    }
+
+    public function setDate(\DateTimeImmutable $date): self
+    {
+        $this->date = $date;
+
+        return $this;
+    }
+
+    public function getSender(): ?User
+    {
+        return $this->sender;
+    }
+
+    public function setSender(?User $sender): self
+    {
+        $this->sender = $sender;
+
+        return $this;
+    }
+
+    /**
+     * @return Collection|User[]
+     */
+    public function getAddressees(): Collection
+    {
+        return $this->addressees;
+    }
+
+    public function addAddressee(User $addressee): self
+    {
+        if (!$this->addressees->contains($addressee)) {
+            $this->addressees[] = $addressee;
+        }
+
+        return $this;
+    }
+
+    public function removeAddressee(User $addressee): self
+    {
+        $this->addressees->removeElement($addressee);
+
+        return $this;
+    }
+
+    public function getRelatedEntityClass(): ?string
+    {
+        return $this->relatedEntityClass;
+    }
+
+    public function setRelatedEntityClass(string $relatedEntityClass): self
+    {
+        $this->relatedEntityClass = $relatedEntityClass;
+
+        return $this;
+    }
+
+    public function getRelatedEntityId(): ?int
+    {
+        return $this->relatedEntityId;
+    }
+
+    public function setRelatedEntityId(int $relatedEntityId): self
+    {
+        $this->relatedEntityId = $relatedEntityId;
+
+        return $this;
+    }
+
+    public function getRead(): array
+    {
+        return $this->read;
+    }
+
+    public function setRead(array $read): self
+    {
+        $this->read = $read;
+
+        return $this;
+    }
+}
diff --git a/src/Bundle/ChillMainBundle/Repository/NotificationRepository.php b/src/Bundle/ChillMainBundle/Repository/NotificationRepository.php
new file mode 100644
index 000000000..844459f8b
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Repository/NotificationRepository.php
@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * Copyright (C) 2021 Champs-Libres <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\MainBundle\Repository;
+
+use Chill\MainBundle\Entity\Notification;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+use Doctrine\Persistence\ObjectRepository;
+
+final class NotificationRepository implements ObjectRepository
+{
+    private EntityRepository $repository;
+
+    public function __construct(EntityManagerInterface $entityManager)
+    {
+        $this->repository = $entityManager->getRepository(Notification::class);
+    }
+
+    public function find($id, $lockMode = null, $lockVersion = null): ?Notification
+    {
+        return $this->repository->find($id, $lockMode, $lockVersion);
+    }
+
+    public function findOneBy(array $criteria, array $orderBy = null): ?Notification
+    {
+        return $this->repository->findOneBy($criteria, $orderBy);
+    }
+
+    /**
+     * @return Notification[]
+     */
+    public function findAll(): array
+    {
+        return $this->repository->findAll();
+    }
+
+    /**
+     * @return Notification[]
+     */
+    public function findBy(array $criteria, array $orderBy = null, $limit = null, $offset = null): array
+    {
+        return $this->repository->findBy($criteria, $orderBy, $limit, $offset);
+    }
+
+    public function getClassName() {
+        return Notification::class;
+    }
+
+}
diff --git a/src/Bundle/ChillMainBundle/migrations/Version20210610140248.php b/src/Bundle/ChillMainBundle/migrations/Version20210610140248.php
new file mode 100644
index 000000000..d54ff4634
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/migrations/Version20210610140248.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Chill\Migrations\Main;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Add table for ChillMain/Notification
+ */
+final class Version20210610140248 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add table for ChillMain/Notification';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE SEQUENCE chill_main_notification_id_seq INCREMENT BY 1 MINVALUE 1 START 1');
+        $this->addSql('CREATE TABLE chill_main_notification (id INT NOT NULL, sender_id INT NOT NULL, message TEXT NOT NULL, date TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, relatedEntityClass VARCHAR(255) NOT NULL, relatedEntityId INT NOT NULL, read JSONB NOT NULL, PRIMARY KEY(id))');
+        $this->addSql('CREATE INDEX IDX_5BDC8067F624B39D ON chill_main_notification (sender_id)');
+        $this->addSql('CREATE UNIQUE INDEX UNIQ_5BDC8067567988B4440F6072 ON chill_main_notification (relatedEntityClass, relatedEntityId)');
+        $this->addSql('COMMENT ON COLUMN chill_main_notification.date IS \'(DC2Type:datetime_immutable)\'');
+        $this->addSql('CREATE TABLE chill_main_notification_addresses_user (notification_id INT NOT NULL, user_id INT NOT NULL, PRIMARY KEY(notification_id, user_id))');
+        $this->addSql('CREATE INDEX IDX_E52C5D2BEF1A9D84 ON chill_main_notification_addresses_user (notification_id)');
+        $this->addSql('CREATE INDEX IDX_E52C5D2BA76ED395 ON chill_main_notification_addresses_user (user_id)');
+        $this->addSql('ALTER TABLE chill_main_notification ADD CONSTRAINT FK_5BDC8067F624B39D FOREIGN KEY (sender_id) REFERENCES users (id) NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('ALTER TABLE chill_main_notification_addresses_user ADD CONSTRAINT FK_E52C5D2BEF1A9D84 FOREIGN KEY (notification_id) REFERENCES chill_main_notification (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('ALTER TABLE chill_main_notification_addresses_user ADD CONSTRAINT FK_E52C5D2BA76ED395 FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE chill_main_notification_addresses_user DROP CONSTRAINT FK_E52C5D2BEF1A9D84');
+        $this->addSql('DROP SEQUENCE chill_main_notification_id_seq CASCADE');
+        $this->addSql('DROP TABLE chill_main_notification');
+        $this->addSql('DROP TABLE chill_main_notification_addresses_user');
+    }
+}