Built in the 7th century, it is one of the two oldest and most sacred monasteries in Bhutan, the other being Jambey Lhakhang in Bumthang. Kyichu Lhakhang is composed of twin temples. The first temple was built by the Tibetan King, Songtsen Gampo in the 7th century. In 1968, Her Majesty, Ashi Kesang Wangmo Wangchuck, the Queen Mother of Bhutan, arranged for a second temple to be built alongside the first one, in same style.