had the 22 letters. Between 1652 and 1654, Athanasius Kircher published his own version of the tree in Oedipus Aegyptiacus. Kircher might have designed his diagram in a syncretic attempt to reconcile several distinct ideas. This heavily annotated version, self-termed "Sephirotic System", introduced more innovations: abstract concepts, divine names, the 22 Hebrew letters for each path, and new astrological symbols. Between 1677 and 1684, Christian Knorr von Rosenroth published "Kabbala Denudat". He designed several new versions of the tree of life, introduced the first version with 11 spheres, placed Daath between Kether and Tiphareth, and attempted to derive the tree of life from elemental geometry.