"Kunkhyen Dolpopa Sherab Gyaltsen (1292-1361) was the fourth Abbot of Jonang Monastery, and one of the great luminary figures of fourteenth century Tibet. His innovative works elucidating a zhentong view and the Kalachakra Tantra have become emblematic of Jonang thought and practice."
http://www.jonangfoundation.org/faq-frequently-asked-questions.shtml#5

In 1327-1331, he built the great mchod-rten of jo-nang in memory of yon-tan-rgya-mtsho.
http://tbrc.org