八思巴
The Mongol conquest of Tibet began after the foundation of the Mongol Empire in the early 13th century. In 1264, the feudal reign over Tibet was given to Drogön Chögyal Phagpa by Kublai Khan, founder of the Yuan dynasty. Sakya lamas, along with Sakya Imperial Preceptors and dpon-chens continued to serve as viceroys or administrators of Tibet on behalf of Yuan emperors for nearly 75 years after Phagpa’s death in 1280, until the Yuan dynasty was greatly weakened by the Red Turban Rebellion in the 1350s, a decade before the Ming dynasty founded by the Han Chinese overthrew Mongol rule in China.