In the twelfth century, the Kagyu tradition, a synthesis of the teachings of Marpa, Milarepa and Gampopa, split into many sub-schools. Gampopa’s student Dusum Khyenpa, who would become known as the First Karmapa, was born in 1110. Another of his students, Pakmodrupa, founded Densatil Monastery in 1158; many of his students went on to establish major Kagyu monasteries and traditions: in 1175, Lama Zhang founded Tsel Gungtang; Jikten Gonpo founded Drigung Til Monastery in 1179; and the following year, Taklung Tangpa Tashi Pel established Taklung Monastery. Brothers Sonam Tsemo and Drakpa Gyeltsen of the Khon clan received Lamdre teachings from their father, Sachen Kunga Nyingpo, in 1140. In 1159, Katok Dorje Den, the earliest Nyingma monastery, was established in Kham by Dampa Deshek, the brother of Pakmodrupa.