The Aqueduct was built during the rule of The Mameluk Sultan El Nasser Mohammed . Sultan El Ghuri made some additions extending it to its actual length. It locates in Fumm El Khalig that begins from Sharia Qasr El Ayni along Sharia Port Said. The Aqueduct was used originally for transmitting water of Nile to the Citadel using huge waterwheels. It was the main source of water for Islamic Cairo for along time. The Aqueduct contains a hexagonal tower on which the waterwheels had been fixed and operated using some buffaloes or oxes. There are stairs outside the Tower that lead to the top of the tower where one can see these wheels.