The basilica cistern is one of the most important tourist destinations in Istanbul that attracts large numbers of tourists for tourism in Turkey thanks to the history of the ancient teacher that dates back to the era of the Byzantine Emperor Justinian I and which he completed during the sixth century AD as one of the water tanks in Istanbul the ground to save water Rain and benefit from it in dry years.
The tank is famous for several names, including the submerged palace, Yerpetan Palace and the basin of the cathedral. It is the largest tank of its kind among the water tanks in old Istanbul with an area of 9800 square meters.
