diff --git a/openslides/motion/models.py b/openslides/motion/models.py
index e1f0eb9a1..61b719091 100644
--- a/openslides/motion/models.py
+++ b/openslides/motion/models.py
@@ -251,8 +251,7 @@ class Motion(SlideMixin, models.Model):
         if self.state.support:
             if not self.is_supporter(person):
                 MotionSupporter(motion=self, person=person).save()
-                #self.writelog(_("Supporter: +%s") % (person))
-            # TODO: Raise a precise exception for the view in else-clause
+                self.write_log(ugettext_noop("Supporter: +%s") % person)
         else:
             raise WorkflowError("You can not support a motion in state %s" % self.state.name)
 
@@ -262,6 +261,7 @@ class Motion(SlideMixin, models.Model):
         """
         if self.state.support:
             self.supporter.filter(person=person).delete()
+            self.write_log(ugettext_noop("Supporter: -%s") % person)
         else:
             raise WorkflowError("You can not unsupport a motion in state %s" % self.state.name)
 
@@ -269,8 +269,8 @@ class Motion(SlideMixin, models.Model):
         """
         Create a new poll for this motion
         """
-        # TODO: auto increment the poll_number in the Database
         if self.state.create_poll:
+            # TODO: auto increment the poll_number in the Database
             poll_number = self.polls.aggregate(Max('poll_number'))['poll_number__max'] or 0
             poll = MotionPoll.objects.create(motion=self, poll_number=poll_number + 1)
             poll.set_options()
@@ -293,7 +293,7 @@ class Motion(SlideMixin, models.Model):
 
         next_state has to be a valid state id or State object.
         """
-        if type(next_state) is not State:
+        if not isinstance(next_state, State):
             next_state = get_state(next_state)
         if next_state in self.state.next_states:
             self.state_id = next_state.id
@@ -359,6 +359,9 @@ class Motion(SlideMixin, models.Model):
         actions['reset_state'] = 'change_state'
         return actions
 
+    def write_log(self, message, person=None):
+        MotionLog.objects.create(motion=self, message=message, person=person)
+
 
 class MotionVersion(models.Model):
     title = models.CharField(max_length=255, verbose_name=ugettext_lazy("Title"))
@@ -401,6 +404,23 @@ class Comment(models.Model):
     creation_time = models.DateTimeField(auto_now=True)
 
 
+class MotionLog(models.Model):
+    motion = models.ForeignKey(Motion, related_name='log_messages')
+    message = models.CharField(max_length=255)
+    person = PersonField(null=True)
+    time = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ['-time']
+
+    def __unicode__(self):
+        # TODO: write time in the local time format.
+        if self.person is None:
+            return "%s %s" % (self.time, _(self.message))
+        else:
+            return "%s %s by %s" % (self.time, _(self.message), self.person)
+
+
 class MotionVote(BaseVote):
     option = models.ForeignKey('MotionOption')
 
diff --git a/openslides/motion/templates/motion/motion_detail.html b/openslides/motion/templates/motion/motion_detail.html
index 234b057ca..d671b472f 100644
--- a/openslides/motion/templates/motion/motion_detail.html
+++ b/openslides/motion/templates/motion/motion_detail.html
@@ -79,4 +79,13 @@
             </a>
         {% endif %}
     {% endwith %}
+
+
+<h4>log</h4>
+<ul>
+    {% for message in motion.log_messages.all %}
+    <li>{{ message }}</li>
+    {% endfor %}
+</ul>
+
 {% endblock %}
diff --git a/openslides/motion/views.py b/openslides/motion/views.py
index 96242a3b1..1f3330f3f 100644
--- a/openslides/motion/views.py
+++ b/openslides/motion/views.py
@@ -15,7 +15,7 @@ from django.core.urlresolvers import reverse
 from django.contrib import messages
 from django.db import transaction
 from django.db.models import Model
-from django.utils.translation import ugettext as _, ugettext_lazy
+from django.utils.translation import ugettext as _, ugettext_lazy, ugettext_noop
 from django.views.generic.detail import SingleObjectMixin
 from django.http import Http404
 
@@ -119,6 +119,11 @@ class MotionCreateView(MotionMixin, CreateView):
     permission_required = 'motion.can_create_motion'
     model = Motion
 
+    def form_valid(self, form):
+        value = super(MotionCreateView, self).form_valid(form)
+        self.object.write_log(ugettext_noop('Motion created'), self.request.user)
+        return value
+
 motion_create = MotionCreateView.as_view()
 
 
@@ -131,6 +136,11 @@ class MotionUpdateView(MotionMixin, UpdateView):
     def has_permission(self, request, *args, **kwargs):
         return self.get_object().get_allowed_actions(request.user)['edit']
 
+    def form_valid(self, form):
+        value = super(MotionUpdateView, self).form_valid(form)
+        self.object.write_log(ugettext_noop('Motion updated'), self.request.user)
+        return value
+
 motion_edit = MotionUpdateView.as_view()
 
 
@@ -268,9 +278,8 @@ class MotionSetStateView(SingleObjectMixin, RedirectView):
                 self.object.reset_state()
             else:
                 self.object.state = kwargs['state']
-        except WorkflowError:
-            messages.error(request, _('Can not set the state to: %s.')
-                           % html_strong(kwargs['state']))
+        except WorkflowError, e:
+            messages.error(request, e)
         else:
             self.object.save()
             messages.success(request, _('Motion status was set to: %s.'