The Jonang (Tibetan: ཇོ་ནང་, Wylie: Jo-nang) is one of the schools of Tibetan Buddhism. Its origins in Tibet can be traced to early 12th century master Yumo Mikyo Dorje, but became much wider known with the help of Dolpopa Sherab Gyaltsen, a monk originally trained in the Sakya school. The Jonang school was widely thought to have become extinct in the late 17th century at the hands of the 5th Dalai Lama, who forcibly annexed the Jonang gompas (Tibetan-style monasteries) to his Gelug school, declaring them heretical.