Built around the first of the major gates on the northern side of the Courtyard, just to the west of the Butchering Area, was a large complex with a domed ceiling called the Hall of the Fire (Beis Hamoked). This building served as sleeping quarters for the watch of Kohanim currently on duty as well as a place for them to warm themselves during the day, a necessary amenity since they had to walk around barefoot on cold marble floors. The large warming fire in the main room of this chamber gave it its name.