For more difficult prisoners the next cell stage was the "cell of penitence". These were situated in small round towers of about 3 metres (ten feet) in diameter. They were painted white and included rudimentary furniture such as a stool and a bed. Very little light was allowed in. If the prisoner did not cooperate, the next step in the detention process was the dungeon. The dungeon had walls 1.5 metres (five feet) thick, double doors and was in complete darkness. No conversation of any type was allowed in the dungeon. The food allowance for prisoners was less than a penny a day including the profit of the warden while any human refuse was removed every four days. After a stay in the dungeon, uncooperative prisoners were moved to their final destination: the torture chamber.