Religious reformer John Wycliffe is condemned as a heretic at the Council of Constance.

John Wycliffe was an English scholastic philosopher, Christian reformer, Catholic priest, and a theology professor at the University of Oxford. Wycliffe is traditionally believed to have advocated for or made a vernacular translation of the Vulgate Bible into Middle English, though more recent scholarship has minimised the extent of his advocacy or involvement for lack of direct contemporary evidence.