Constantinople / Konstantiniyye / Istanbul, was the capital of the Eastern Roman (Byzantine) and Ottoman Empires. Monuments such as Beyazıt Square, Forum Tauri, the Arch and Forum of Theodosius, the Forum of Constantine, Mese Avenue (Divan Yolu in the Ottoman Empire), The Great Palace, Boukoleon Palace, the Church of the Myrelaion Monastery (Laleli Bodrum Mesih Pasha Mosque) and the Hagia Sophia and surroundings form the monumental core of the city. Still, there are hundreds of uncovered and unknown Byzantine artifacts underneath the historical peninsula, many are believed to be cisterns, that continued to be used in the Ottoman era. Ancient Cisterna, located beneath the current Antik Hotel Istanbul is also one of the - Byzantine heritage - cisterns. In 1984, during the construction of the Hotel, historical remains were found 12 meters beneath the ground. The construction was halted and salvage excavation was initiated under the supervision of the Istanbul Archaeology Museum. Compositional analysis carried out by the Byzantine Archaeologists under the direction of Semavi Eyice, eminent Byzantine art historian, who identified remains as a Late Roman/ Early Byzantine Public Building, which was then converted into water cisterns. This structure was registered by the ``Istanbul Historical Monuments Board`` and taken under protection. Some of the artifacts have been delivered to the Istanbul Archaeology Museum, while others are still exhibited at the Hotel.