Dalai Lama's winter palace in Lhasa, Tibet — 1,000 rooms across 13 storeys on a 130 m hill. Inscribed 1994.
From Wikipedia
Potala Palace is a museum complex in Lhasa, the capital of the Tibet Autonomous Region of China. It was formerly the winter palace of the Dalai Lamas, built in the dzong style on Marpo Ri. From 1649 until 1959 it served as the Dalai Lamas' residence, after which it became chiefly a museum following the annexation of Tibet by the People's Republic of China.