Yumbulagang (also known as Yumbu Lhakhang or Yungbulakang Palace) is an ancient palace in the district of Nêdong in the vicinity of Zêtang in the county Shannan. It was the first palace for the first Tibetan king Niechi in Tibet. A legend counts Yumbulagang as the first building in Tibet. It is also named "The Mosher and Song Holy Hall" as during King Niechi's rule, the Yalong tribe gradually expanded in power and conquered other important tribes in the area, eventually under the rule of Songtsan Gampo who united the lands into the Tubo kingdom in the 7th century. According to a legend of followers of the Bön religion, Yumbulagang was erected in the second century B.C. for the first Tibetan king Nyatri Tsenpo. Later, Yumbulagang became the summer palace of the 33rd king Songtsen Gampo and princess Wencheng. After Songtsen Gampo had transferred his seat to Lhasa, Yumbulagang became a shrine and under the reign of the 5th Dalai Lama, Ngawang Lobsang Gyatso, a monastery of the Gelugpa school.