This is the Topkapi Palace, in Istanbul, Turkey. This palace dates from before the Ottoman Empire but it was improved by the Ottoman Empire. This palace has some very wonderful are from the Ottoman Empire.
Medusa pillar, Basilica Cistern ~ The Basilica Cistern is the largest of several hundred ancient cisterns that lie beneath Istanbul. Before being converted to a cistern, a great Basilica stood in its place, built between the and centuries.