The structure was known in Byzantium as the basilica Cistern, Justinian was the founder of the largest underground cistern, built after the Nika Revolt in 532.The number of the inhabitants of Constantinople increased and bring a problem of water supply. Basilica Cistern was used to store water for the Great Palace among the other buildings on the Firth Hill. During the Justinian time, After the Conquest the water in the Basilica Cistern were used for the garden of TopkapıPalace. It is 140 meters long and 70 meters wide. The twelve rows of 28 columns each, 336 altogether, capacityof having eight thousand cubic meters water. Basilica Cistern was restored in 1980.