Kumbum Jampa Ling is a major Geluk monastery in Amdo built on the site of Tsongkhapa's birth. Construction began in 1560 by a monk named Rinchen Tsondru Gyeltsen around a stupa that Tsongkhapa's mother is said to have built in 1379. In 1583 the Third Dalai Lama, Sonam Gyatso, stayed there and requested the monk to expand it. The Cheso, Ngago and Taktser incarnation lines all have seats there. Kumbum has four colleges: the Tantric College, which was built by Choje Lekpa Gyatso in 1649; the Debate College, built in 1612 by Duldzin Ozer Gyatso; the Medical College, which opened in 1725; and the Kālacakra College, established in 1820.