Hugh Richardson
The Zha Lhakhang, a small temple north of Lhasa, was constructed by Nyang Tingdzin Zangpo around the late eighth century or early ninth century on land given to him by Tride Songtsen. According to legend, Vimalamitra concealed Dzogchen teachings there which were then discovered by Dangma Lungyal in the eleventh century. Zha Lhakang was converted from Nyingma to Drigung Kagyu, and later to Geluk. It is currently affiliated with Sera Je.