Potala Palace is a large and impressive building located on the Red Mountain, northwest of Lhasa city. It was built in 637 by Songtsan Gampo and was a Royal Palace. Later in 1645 Lozang Gyatso, the great fifth Dalai Lama reconstructed the Potala Palace and then became the residence of Dalai Lama. 1994, the UNESCO put the Potala Palace onto the World Cultural Heritage List. In 2001, the State Tourism Administration rated it as 4A tourism spot on the national level. It is 117 m high, 13 storied and has 1000 rooms. Different sections of the palace houses a great wealth of cultural and art objects of Tibet. Many parts of the palace, now turned to a museum is open for the visitor.