Together with the elephant stables to the east and a ruined structure to the west, this building defines a rectangular open area possibly used for military displays. It is, therefore, likely that this monument had some martial purpose. Today it is usually identified as the "guard’s quarters".
This rectangular building contains within its interior an open courtyard surrounded on four sides by a raised colonnade. This colonnade is discontinuous in the middle of the south side where a walkway at outward level leads to the principal entrance. An additional colonnaded verandah is found to the south, facing onto the open area. Breaks in the wall at either end of the verandah link the two colonnades. A long stair¬case built into the thickness of the east wall ascends to the roof.