Drogön Chögyal Phagpa
Sonam Gyatso publicly announced that he was a reincarnation of the Tibetan Sakya monk Drogön Chögyal Phagpa (1235–1280) who converted Kublai Khan, while Altan Khan was a reincarnation of Kublai Khan (1215–1294), the famous ruler of the Mongols and Emperor of China, and that they had come together again to cooperate in propagating the Buddhist religion. While this did not immediately lead to a massive conversion of Mongols to Buddhism (this would only happen in the 1630s), it did lead to the widespread use of Buddhist ideology for the legitimation of power among the Mongol nobility. Last but not least, Yonten Gyatso, the fourth Dalai Lama, was a grandson of Altan Khan.