On this day in history, June 3, 1140... French philosopher and founder of the metaphysical school of nominalism Peter Abelard was found guilty of heresy, putting an end to his teaching career. While teaching in Paris, he became embroiled in a controversy with French abbot Bernard of Clairvaux. Bernard secretly had Abelard's works reviewed on suspicion of heresy before a public debate could take place to settle their disagreements. Abelard left to Rome to appeal to the Pope, but before he even reached Rome, the Pope had ordered Abelard to silence. He and his followers were eventually excommunicated. Abelard is also famous for his love affair (and eventual marriage) to Héloïse d'Argenteuil.