diff --git a/patchwork/migrations/0038_submission_relations.py b/patchwork/migrations/0038_submission_relations.py
new file mode 100644
index 000000000000..4c5274c64c09
--- /dev/null
+++ b/patchwork/migrations/0038_submission_relations.py
@@ -0,0 +1,30 @@
+# Generated by Django 2.2.6 on 2019-12-08 03:00
+
+import datetime
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+import patchwork.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('patchwork', '0037_event_actor'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SubmissionRelation',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('by', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='submission',
+            name='related',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='submissions', related_query_name='submission', to='patchwork.SubmissionRelation'),
+        ),
+    ]
diff --git a/patchwork/models.py b/patchwork/models.py
index 7f0efd489ae3..a92203b24ff2 100644
--- a/patchwork/models.py
+++ b/patchwork/models.py
@@ -374,6 +374,9 @@ class Submission(FilenameMixin, EmailMixin, models.Model):
     # submission metadata
 
     name = models.CharField(max_length=255)
+    related = models.ForeignKey(
+        'SubmissionRelation', null=True, blank=True, on_delete=models.SET_NULL,
+        related_name='submissions', related_query_name='submission')
 
     @property
     def list_archive_url(self):
@@ -863,6 +866,13 @@ class BundlePatch(models.Model):
         ordering = ['order']
 
 
+class SubmissionRelation(models.Model):
+    by = models.ForeignKey(User, on_delete=models.CASCADE)
+
+    def __str__(self):
+        return ', '.join(s.name for s in self.submissions.all()) or '<Empty>'
+
+
 @python_2_unicode_compatible
 class Check(models.Model):
 
diff --git a/patchwork/templates/patchwork/submission.html b/patchwork/templates/patchwork/submission.html
index 77a2711ab5b4..bb0391f98ff4 100644
--- a/patchwork/templates/patchwork/submission.html
+++ b/patchwork/templates/patchwork/submission.html
@@ -110,6 +110,43 @@ function toggle_div(link_id, headers_id, label_show, label_hide)
   </td>
  </tr>
 {% endif %}
+{% if submission.related %}
+ <tr>
+  <th>Related</th>
+  <td>
+   <a id="togglerelated"
+      href="javascript:toggle_div('togglerelated', 'related')"
+   >show</a>
+   <div id="related" class="submissionlist" style="display:none;">
+    <ul>
+     {% for sibling in submission.related.submissions.all %}
+      <li>
+       {% if sibling.id != submission.id and sibling.project_id == project.id %}
+        <a href="{% url 'patch-detail' project_id=project.linkname msgid=sibling.url_msgid %}">
+         {{ sibling.name|default:"[no subject]"|truncatechars:100 }}
+        </a>
+       {% endif %}
+      </li>
+     {% endfor %}
+     {% if related_outside %}
+      <a id="togglerelatedoutside"
+         href="javascript:toggle_div('togglerelatedoutside', 'relatedoutside', 'show from other projects')"
+      >show from other projects</a>
+      <div id="relatedoutside" class="submissionlist" style="display:none;">
+       {% for sibling in related_outside %}
+        <li>
+         <a href="{% url 'patch-detail' project_id=sibling.project.linkname msgid=sibling.url_msgid %}">
+          {{ sibling.name|default:"[no subject]"|truncatechars:100 }}
+         </a> (in {{ sibling.project }})
+        </li>
+       {% endfor %}
+      </div>
+     {% endif %}
+    </ul>
+   </div>
+  </td>
+ </tr>
+{% endif %}
 </table>
 
 <div class="patchforms">
diff --git a/patchwork/views/patch.py b/patchwork/views/patch.py
index f34053ce57da..0480614614ad 100644
--- a/patchwork/views/patch.py
+++ b/patchwork/views/patch.py
@@ -110,12 +110,19 @@ def patch_detail(request, project_id, msgid):
     comments = comments.only('submitter', 'date', 'id', 'content',
                              'submission')
 
+    if patch.related:
+        related_outside = patch.related.submissions \
+            .exclude(project=patch.project)
+    else:
+        related_outside = []
+
     context['comments'] = comments
     context['checks'] = patch.check_set.all().select_related('user')
     context['submission'] = patch
     context['patchform'] = form
     context['createbundleform'] = createbundleform
     context['project'] = patch.project
+    context['related_outside'] = related_outside
 
     return render(request, 'patchwork/submission.html', context)
 
