Franz Hartmann (22 November 1838 - 7 August 1912) was a German physician, theosophist, occultist, geomancer, astrologer, and author of esoteric works. He wrote esoteric studies and a biography of Jakob Bohme and of Paracelsus. He translated the Bhagavad Gita into German and was the editor of the journal Lotusbluten. He was at one time a co-worker of Helena Blavatsky at Adyar. In 1896 he founded a German Theosophical Society. He also supported the Guido-von-List-Society (Guido-von-List-Gesellschaft). He cofounded the Ordo Templi Orientis with Carl Kellner and Theodor Reuss.