Aleister Crowley (1875 - 1947)

Aleister Crowley (12 October 1875 – 1 December 1947), born Edward Alexander Crowley, and also known as both Frater Perdurabo and The Great Beast 666, was an English occultist, mystic, ceremonial magician, poet and mountaineer, who was responsible for founding the religious philosophy of Thelema.