diff --git a/drafts/object_model.rst b/drafts/object_model.rst
index 9c558e35..1ae60b2c 100644
--- a/drafts/object_model.rst
+++ b/drafts/object_model.rst
@@ -1 +1,28 @@
-.
+
+
+
+
+::
+
+ +---------------+
+ | Room          |
+ |   "Room-ID"   |
+ |   {State}     |         +----------------------+
+ |     Name------|-------->| Event m.room.name    |
+ |     Topic     |         |   "Name"             |
+ |     [Aliases] |         +----------------------+      +-------------+
+ |     [Members]-|---+     +----------------------+ <----| Start Token |
+ |   [Messages]  |   |     | Event m.room.member  |      +-------------+
+ |     |   |     |   +---->|   "invite/join/ban"  |
+ +---------------+         |   "User-ID"          |
+       |   |               +----------------------+
+       |   |               +----------------------+
+       |   | Message       | Event m.room.message |
+       |   +-------------->|   {content}          |<--+
+       |                   +----------------------+   |
+       | Comment           +----------------------+   |
+       +------------------>| Event m.room.message |   |
+                           |   {content}          |   |
+                           |   "relates-to"-------|---+  +-------------+
+                           +----------------------+ <----|  End Token  |
+                                                         +-------------+