八思巴
In 1253, Drogön Chögyal Phagpa (1235–1280) succeeded Sakya Pandita at the Mongol court. Phagpa became a religious teacher to Kublai Khan. Kublai Khan appointed Chögyal Phagpa as his Imperial Preceptor (originally State Preceptor) in 1260, the year when he became Khagan. Phagpa developed the priest-patron concept that characterized Tibeto-Mongolian relations from that point forward. With the support of Kublai Khan, Phagpa established himself and his sect as the preeminent political power in Tibet. Through their influence with the Mongol rulers, Tibetan lamas gained considerable influence in various Mongol clans, not only with Kublai, but, for example, also with the Il-Khanids.