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
Saint Gregory the Illuminator Church of Galata church. Historian Kevork Pamukciyan believes that the current church was built on the location of St. Sargis, an Armenian church in Galata, mentioned in two Armenian manuscripts from 1360 and 1361. The church and an Armenian quarter around it are recorded in an Ottoman survey from 1455 which indicated the "continuation of the Byzantine Armenian presence into the Ottoman period." In 1635 Patriarch Grigor Kesaratsi (Gregory of Caesarea) was buried at the wall of the church by Shahin Çelebi, a wealthy Armenian. The church was often damaged by fires. It survived the Galata fire of 1660. It burned almost entirely