The most detailed and comprehensive treatise on swordsmanship ever written, Gerard Thibault’s Academy of the Sword offers an extraordinary glimpse into a forgotten landscape of ideas, in which Pythagorean sacred geometry illuminated the lethal realities of rapier combat to create one of the Western world’s only thoroughly documented esoteric martial arts. Translated by the widely respected occultist and scholar John Michael Greer, this stunningly illustrated and precisely detailed manual of Renaissance swordsmanship is a triumphant document of Renaissance culture-as well as a practical manual of a martial art that can still be studied and practiced today.