At the base of the staircase, leading down to the dungeon, the passageway leads to the left. On each side, where dungeon cells once stood, the walls and cell gates had been knocked, cleared and disposed of - creating a chamber, of sorts. In the center of the still dusty clearing, a tungsten slab as wide and long as a dining table, and thick as two steps on the dungeon staircase, was bolted to the floor.