The remains of a cistern were discovered during the construction of a business center in 1984. The cistern was originally located just south of the Forum of Theodosius (now  near Beyazıt) in Constantinople. The cistern is around 20 X 15 meters. While no traces of its roof survived, the remains of its walls are lined with hydraulic mortar and have a maximum height of 6.5 meters. The excavation also uncovered 13 columns. 
The area of the cistern was a necropolis in the Hellenistic and Roman eras, which was later developed after Constantine moved his capital to the city. The date of the cistern is uncertain, but it perhaps dates as early as the 4th century. It is also uncertain what type of building it would have originally served. Other surviving Late Antique buildings south of the Mese were civilian residences, the Palace of Antiochus and perhaps the rotunda of the Myrelaion. The cistern, which was preserved in the basement of Antik Hotel, currently functions as a restaurant and bar.