Okay, it’s seemingly a ‘click bait’ site, but at least it is reasonably well-informed…

Aleister Crowley was one of the most bizarre, fascinating, and mysterious figures of the 20th century. Known in his own time as “the wickedest man in the world,” Crowley equally attracted and repulsed his contemporaries. From spiritualism and writing to mountain climbing, yoga, and the occult, Crowley left his mark on many different facets of life. But he is perhaps most famous – or infamous – for his controversial, influential beliefs.

Source: 22 Crazy Facts About Aleister Crowley