This is my castle keep. While it is a stand alone building (at the moment) it is built to William Howard's castle wall standard for compatability at displays. It is a three storey building with a multi-sloped roof and walkway around (with trapdoor for access from inside). It is hinged to allow internal access and I will get around sometime to fitting out the interior with floors, stairs, rooms, etc.
UPDATE 2008: I have to say I still really like this diminutive keep. I'm half tempted to build it again, in a reversal of my giant keep trend, and try and get some collaborative castle displaying done with Brickish again. I might actually get around to fitting it out too!