Phagmo Drupa Dorje Gyalpo [1110-1170], was one of the three main disciples of Gampopa Sonam Rinchen who established the Dagpo Kagyu school of Tibetan Buddhism; and a disciple of Sachen Kunga Nyingpo [1092-1158] one of the founders of the Sakya school of Tibetan Buddhism. He was the elder brother of Kathog Dampa Deshek [1122-1192], who founded Kathog monastery and the Kathog branch of the Nyingma school.