May-Oct: daily except Mon 10am-5.30pm; Jan-Apr: weekends 10am-4pm (5pm in Apr) - guided tour only - closed 24, 25 and 31 Dec
Description
Built by Carl von Gontard, the Marble Palace was adapted by Langhans for use as a summer residence by Frederick Wilhelm II (1786-97). Interior highlights include the concert hall with its views over the water on three sides and the Oriental Room.