LHASA, Jan. 20 (Xinhua) -- A museum about Tibet Tubo Kingdom will open to tourists in May, it was announced Wednesday.

The Tubo Museum on a mountainside in Qonggyai County, where China's largest group of mausoleums of the 29th-40th (and last) Tibetan kings, their wives and senior kingdom officials, are located.

Among these mausoleums is that of Songtsan Gambo, arguably the most famous Tibetan king due to his marriage to Princess Wencheng of the early Tang Dynasty (618-907).

Covering an area of 12,000 square meters, the museum includes two clusters of buildings and is divided into three exhibition halls about Tubo's kings, society and religion, and the mausoleums.

According to the plan, the number of displayed items will increase from 2,000 in the first phase to 10,000 in the second phase.

The museum cost 30 million yuan (4.57 million U.S.dollars) to build.

"The museum displays the different aspects of the Tubo period and its splendid culture while protecting its original condition," said Dawa, chair of Tibet Cultural Tourism.

The project is a cooperation between Qonggyai County government and the company. The project is driven by the principles of protection and development.

The museum will be open to the public on May 20, the entry fee will be 180 yuan.