The major orders of Buddhism in Bhutan are Drukpa Kagyu and Nyingma. The former is a branch of the Kagyu School and is known for paintings documenting the lineage of Buddhist masters and the 70 Je Khenpo (leaders of the Bhutanese monastic establishment). The Nyingma order is known for images of Padmasambhava, who is credited with introducing Buddhism into Bhutan in the 7th century. According to legend, Padmasambhava hid sacred treasures for future Buddhist masters, especially Pema Lingpa, to find. The treasure finders ("tertön") are also frequent subjects of Nyingma art.