diff --git a/freepost/__init__.py b/freepost/__init__.py
index 783bd10..08510dd 100755
--- a/freepost/__init__.py
+++ b/freepost/__init__.py
@@ -143,6 +143,30 @@ def new ():
         posts=posts,
         sorting='new')
 
+# TODO implement this
+@get ('/topic/<name>', name='topic')
+def topic (name):
+    """
+    Display posts by topic.
+    """
+    
+    return ""
+    
+    # Page number
+    page = int (request.query.page or 0)
+    
+    if page < 0:
+        redirect (application.get_url ('topic', name=name))
+    
+    user = session.user ()
+    posts = database.get_topic_posts (page, user['id'] if user else None)
+    
+    return template (
+        'homepage.html',
+        page_number=page,
+        posts=posts,
+        sorting='hot')
+
 @get ('/about', name='about')
 def about ():
     """
@@ -394,6 +418,7 @@ def update_user ():
     if about is None or email is None:
         redirect (application.get_url ('user'))
     
+    # TODO check unique value of emails
     database.update_user (user['id'], about, email, False)
     
     redirect (application.get_url ('user'))
diff --git a/freepost/templates/homepage.html b/freepost/templates/homepage.html
index 5d2a3c6..521cc57 100755
--- a/freepost/templates/homepage.html
+++ b/freepost/templates/homepage.html
@@ -45,7 +45,7 @@
                     
                     <div class="topics">
                         {% for topic in topics %}
-                            <a href="" class="topic">{{ topic }}</a>
+                            <a href="{{ url ('topic', name=topic) }}" class="topic">{{ topic }}</a>
                         {% endfor %}
                     </div>