diff --git a/apps/collection/models.py b/apps/collection/models.py
index 7acd9991..14bd99c0 100644
--- a/apps/collection/models.py
+++ b/apps/collection/models.py
@@ -80,6 +80,8 @@ class Collection(ProjectBaseMixin, CollectionDateMixin,
                             verbose_name=_('Collection slug'), editable=True, null=True)
     old_id = models.IntegerField(null=True, blank=True)
 
+    rank = models.IntegerField(null=True, default=None)
+
     objects = CollectionQuerySet.as_manager()
 
     class Meta:
diff --git a/apps/collection/serializers/back.py b/apps/collection/serializers/back.py
index 6cedb087..f41e3875 100644
--- a/apps/collection/serializers/back.py
+++ b/apps/collection/serializers/back.py
@@ -40,6 +40,7 @@ class CollectionBackOfficeSerializer(CollectionBaseSerializer):
             # 'end',
             'count_related_objects',
             'related_object_names',
+            'rank',
         ]
 
 
@@ -68,15 +69,15 @@ class CollectionBindObjectSerializer(serializers.Serializer):
         attrs['collection'] = collection
 
         if obj_type == self.ESTABLISHMENT:
-            establishment = Establishment.objects.filter(pk=obj_id).\
+            establishment = Establishment.objects.filter(pk=obj_id). \
                 first()
             if not establishment:
                 raise BindingObjectNotFound()
-            if request.method == 'POST' and collection.establishments.\
+            if request.method == 'POST' and collection.establishments. \
                     filter(pk=establishment.pk).exists():
                 raise ObjectAlreadyAdded()
-            if request.method == 'DELETE' and not collection.\
-                    establishments.filter(pk=establishment.pk).\
+            if request.method == 'DELETE' and not collection. \
+                    establishments.filter(pk=establishment.pk). \
                     exists():
                 raise RemovedBindingObjectNotFound()
             attrs['related_object'] = establishment
@@ -84,10 +85,10 @@ class CollectionBindObjectSerializer(serializers.Serializer):
             product = Product.objects.filter(pk=obj_id).first()
             if not product:
                 raise BindingObjectNotFound()
-            if request.method == 'POST' and collection.products.\
+            if request.method == 'POST' and collection.products. \
                     filter(pk=product.pk).exists():
                 raise ObjectAlreadyAdded()
-            if request.method == 'DELETE' and not collection.products.\
+            if request.method == 'DELETE' and not collection.products. \
                     filter(pk=product.pk).exists():
                 raise RemovedBindingObjectNotFound()
             attrs['related_object'] = product
diff --git a/apps/collection/views/back.py b/apps/collection/views/back.py
index 65bd6c8b..67548c83 100644
--- a/apps/collection/views/back.py
+++ b/apps/collection/views/back.py
@@ -1,6 +1,7 @@
 from rest_framework import generics
 from rest_framework import permissions
-from rest_framework import viewsets, mixins
+from rest_framework import viewsets
+from rest_framework.response import Response
 
 from collection import models
 from collection.serializers import back as serializers
@@ -49,6 +50,11 @@ class CollectionBackOfficeViewSet(mixins.CreateModelMixin,
         elif obj_type == self.bind_object_serializer_class.PRODUCT:
             collection.products.remove(related_object)
 
+    def list(self, request, *args, **kwargs):
+        queryset = self.filter_queryset(self.get_queryset()).order_by('rank', '-start')
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data)
+
 
 class CollectionBackOfficeView(generics.GenericAPIView):
     """ViewS for Collection model."""