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
Minorities in Turkey of Turkey's population. Up to 300,000 of Azeris who reside in Turkey are citizens of Azerbaijan. In the Eastern Anatolia Region, Azeris are sometimes referred to as "acem" (see Ajam) or "tat". They currently are the largest ethnic group in the city of Iğdır and second largest ethnic group in Kars. Before the 20th century, Crimean Tatars had immigrated from Crimea to Turkey in three waves: First, after the Russian annexation of Crimea in 1783; second, after the Crimean War of 1853-56; third, after the Russo-Turkish War of 1877–78. The official number of Crimean Tatars is 150,000 (in the center