Oswald Wirth (1860 - 1943) was a Swiss occultist, artist and author. He studied esotericism and symbolism with Stanislaus de Guaita, and created a set of Tarot trumps based on the Marseilles deck. His interests also included Freemasonry and astrology. Wirth is the artist responsible for the so-called Baphomet or Leviathan design of a goat head inside a pentagram that was modified for use as the logo for Anton LaVey's Church of Satan. Wikipedia
The definitive Wikipedia entry for Oswald Wirth. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Oswald_Wirth