Fulk of Neuilly was a French priest and preacher who lived in the late twelfth and early thirteenth centuries. Based in Neuilly-sur-Marne, he studied under Peter the Chanter in Paris before beginning his public ministry around 1195. He became widely recognized for his eloquent sermons, which frequently addressed moral failings such as lust and usury. His influential preaching eventually led Pope Innocent III to invite him to advocate for a crusade, an effort that helped inspire the Fourth Crusade.