Istanbul has a new attraction: a 1600-year-old underground reservoir was opened for tourists
The Feodosius tank, part of the Byzantine water supply system, which was still working as Istanbul by Constantinople, is open to visiting Chamberlithic microdistrict in the historical part of the city. The water reservoir built during the reign of the Byzantine emperor Theodosius II (428–443), which is nearly 1,600 years old, is an important element of complex infrastructure built by the Byzantines, and then preserved and modernized during the Ottoman Empire.