This is inspired from Paul Riccius' "Portae Lucis" (Gates of light) or (Doors of Light) 16th century originally published in 1516, Augsberg, Germany. - http://altreligion.about.com/library/texts/bl_mtol7.htm and http://arsobscurabookbinding.com/artprints.html

Also available at:
Portae Lucis - Tree of Life - http://www.deviantart.com/deviation/50000139/