Ganden Monastery
Duldzin Dragpa Gyaltsen (1350-1413), one of the eight main disciples of Je Tsongkhapa (the founder of the Gelugpa order), was considered to be a previous incarnation of Panchen Sonam Dragpa. According to Kelsang Gyatso it was Duldzin Dragpa Gyaltsen who built Ganden Monastery. but other sources do not confirm this. His student Jamyang Choje Tashi Palden (1379-1449), founded of Drepung Monastery.