The administration of the külliyye rested upon the administrative officers also under the chief eunuch in the department of harem at Topkapi Palace (Ottoman Sultans primary and official palace of residence).[3] Among the administrative officers, the külliyye also had "religious officers and teachers, porters, chanters, grave diggers, servants responsible for maintenance, including the polishing of courtyards and window grilles, cooks, scullions, plumbers, lamp-lighters, a guard against the theft of oil lamps, carpenters, masons and tillers responsible for the lead sheets covering over 500 domes".[3] The staff magnitude illustrate the sophistication of the külliyye; though it began with a simple concept, it had developed and become complex that a magnitude of staffs and officers were needed to manage it.