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.
The Basilica Cistern (Turkish: Yerebatan Sarayı - "Sunken Palace", or Yerebatan Sarnıcı - "Sunken Cistern"), is the largest of several hundred ancient cisterns that lie beneath the city of Istanbul (formerly Constantinople), Turkey. The cistern, located 5