José Ignacio Cabezón
Sera Ngagkpa Dratsang, the Tantric college of Sera Monastery, was established initially in 1419 by Jamchen Choje Shākya Yeshe and expanded in the eighteenth century by Lhazang Khan. It was initially the gathering hall for Sera and when a new gathering hall was constructed, the Ngakpa college expanded from its smaller building to the former gathering hall. The original building was then used as a ritual college. The Tantric College is the smallest of the three surviving colleges of Sera.