Labrang Tashikhyil is a major Geluk monastery in Amdo. It was founded in 1709 by the First Jamyang Zhepa, Jamyang Zhepai Dorje under the sponsorship of a prince of the Qoshot Mongols, who donated the land and paid for the construction. Many incarnation lines have their seats at Labrang Monastery including the Jamyang Zhepa, Amdo Zhamar and Gungtang incarnation lines. Labrang has six colleges, the largest of which is the debate college, Mejung Tosam Ling, which was established by the First Jamyang Zhepa when he built the monastery. The Tantric College has two branches, the Lower, established by Jamyang Zhepa in 1719, and the Upper, established in 1943 by the Fifth Jamyang Zhepa. The Second Jamyang Zhepa built the Kālacakra College in 1763 and the Medical College in 1784. The Fourth Jamyang Zhepa established the Hevajra College in 1879.