The Lukhang - a hidden temple in Tibet

"The top floor of the little known Lukhang temple enshrines a series of murals which the present Dalai Lama refers to as jewels of Tibetan civilization. An artistic representation of the Buddhist path to enlightenment, the Lukhang murals offered visual guidance to successive incarnations of Dalai Lamas who retired to the 20 X 20 foot chamber for periods of meditation and spiritual retreat."

http://www.asianart.com/articles/baker/index.html

See also: http://www.thdl.org/collections/cultgeo/lukhang/images.html