But his assassin seems to have had serious mental problems.  I think that's a lot different than a sane person motivated by religious reasons, and so to refer to him as a “religious fundamentalist” is a bit of a mischaracterization."Obsessed by religion, he sought admission to the ascetic Feuillants order, but after a short probation he was dismissed as being "prey to visions". An application for admission to the Society of Jesus was also unsuccessful in 1606."http://en.wikipedia.org/wiki/Fran%C3%A7ois_Ravaillac

Pretty neat story though.  I would have liked to see a picture of the preserved head to.