d to be located on the Sarayburnu, while higher-end hotels are primarily located in the entertainment and financial centers north of the Golden Horn. Istanbul's seventy museums, the most visited of which are the Topkapı Palace Museum and the Hagia Sophia, bring in US$30 million of revenue each year. The city's environmental master plan also notes that there are 17 palaces, 64 mosques, and49 churches of historical significance in Istanbul
