Gérard Anaclet Vincent Encausse, whose esoteric pseudonyms were Papus and Tau Vincent, was a French physician, hypnotist, and popularizer of occultism, who founded the modern Martinist Order.

Western esotericism, also known as esotericism, esoterism, and sometimes the Western mystery tradition, is a term scholars use to classify a wide range of loosely related ideas and movements that developed within Western society. These ideas and currents are united since they are largely distinct both from orthodox Judeo-Christian religion and Age of Enlightenment rationalism. It has influenced various forms of Western philosophy, mysticism, religion, pseudoscience, art, literature, and music.