The Gelug or Geluk (Wylie transliteration: Dge-lugs, Tibetan: དགེ་ལུགས་པ་), also known as the Yellow Hat sect, was a school of Buddhism founded by Tsongkhapa (1357-1419), a philosopher and Tibetan religious leader. The first monastery he established was at Ganden, and to this day the Ganden Tripa (Dga'-ldan Khri-pa) is the nominal head of the school, though its most influential figure is the Dalai Lama.