Sultan's Suite
$7,500 per night
The Ciragan Palace Hotel Kempinski in Istanbul, located along the Bosporus, was originally the home of the last Ottoman sultans, and different incarnations of the property have been built (and torn down) since the 16th century. The building was bought by the Kempinski hotel group in 1986 and underwent a renovation in 1991.
Today, the hotel comprises two structures (the actual palace and the new hotel), and the Sultan's Suite is the most expensive room there.