The Mongols were highly tolerant of most religions during the early Mongol Empire, and typically sponsored several at the same time. At the time of Genghis Khan in the 13th century, virtually every religion had found converts, from Buddhism to Eastern Christianity and Manichaeanism to Islam. To avoid strife, Genghis Khan set up an institution that ensured complete religious freedom, though he himself was a Shamanist. Under his administration, all religious leaders were exempt from taxation, and from public service. Mongol emperors were known for organizing competitions of religious debates among clerics, and these would draw large audiences.