Yumbulakhang was built in the second century B.C. for the first king of Tibet, “Nyatri Tsenpo”. It is located on the southern side of Tsedang in Yarlung Valley. Tsedang is the prefecture seat of Lhoka. Originally only the central building was built as a palace, but the chapels we can see now were constructed later, and the golden roof was made during the time of the fifth Dalai Lam... https://www.nomadictibet.com/yumbulakhang/