Tourism in Turkey important tourism spots not only in Turkey but also in the world. There are thousands of hotels and other tourist-oriented industries in the city, catering to both vacationers and visiting professionals. Turkey's largest city and metropolis and a leading global city, Istanbul, has a number of major attractions derived from its historical status as capital of the Byzantine and Ottoman Empires. These include the Sultan Ahmed Mosque (the "Blue Mosque"), the Hagia Sophia, the Topkapı Palace, the Basilica Cistern, the Dolmabahçe Palace, the Galata Tower, the Grand Bazaar, the Spice Bazaar, and the Pera Palace Hotel. Istanbul has also recently
Galata Camondo Palace ("Kamondo Sarayı"), was built between 1865 and 1869 and designed by architect Sarkis Balyan. It is located on the northern shore of the Golden Horn, within the nearby Kasımpaşa quarter to the west of Galata. It later became the headquarters of the Ministry of the Navy ("Bahriye Nezareti") during the late Ottoman period, and is currently used by the Turkish Navy as the headquarters of the Northern Sea Area Command ("Kuzey Deniz Saha Komutanlığı"). The Camondo family also built two historic apartment buildings in Galata, both of which are named "Kamondo Apartmanı": the older one is located at