The only weapon banned by the Catholic Church

This weapon was banned by Pope Innocent the II for use against  Christians. Before the introduction of the arbalest a mounted knight could pretty much mow down foot soilders at will. But armed with a crossbow a comon foot soilder drop a mounted night with ease. This presented a conundrum for the Church since the cash flowed from the nobility. So you could draw,quarter burn alive and otherwise create any mayhem you could imagine. But stick a bolt in some armored miscreant you were going to Hell. Unless he wasn't Christian or noble(no cash see)