This great kiva of Chetro Ketl was built on an earlier structure of the same form, which is revealed in the cut-away section of floor. Great kivas contain a set of highly formalized features: an entryway and antechamber on the plaza level, a low masonry bench encircling the base of the room, a raised masonry fire box and deflector, four seating pits (for roof supports) and raised floor vaults between the circular seating pits. chacoarchive.org/cr ... etl/