The Mongol prince Godan, a grandson of Genghis Khan, raided as far as Lhasa. During his attack in 1240, Prince Godan summoned <answer>Sakya Pandita</answer> (1182–1251), leader of the Sakya school of Tibetan Buddhism, to his court in what is now Gansu in Western China. With <answer>Sakya Pandita</answer>'s submission to Godan in 1247, Tibet was officially incorporated into the Mongol Empire during the regency of Töregene Khatun (1241–1246). Michael C. van Walt van Praag writes that Godan granted <answer>Sakya Pandita</answer> temporal authority over a still politically fragmented Tibet, stating that "this investiture had little real impact" but it was significant in that it established the unique "Priest-Patron" relationship between the Mongols and the Sakya lamas.
Who was the leader of the Sakya school of Tibetan Buddhism?
Sakya Pandita