With a halberd, two spears and two swords, this small shack is heavily armed. Strangely, the guard doesn't have a shield. On the back of the tower is a ladder that leads to the top.
The Black Knights seem to be quite fond of locking up ghosts in small shacks, since this set bears a striking resemblance to 6034 Black Monarch's Ghost. These two sets are also the smallest buildings of this faction.