Jean Charlier de Gerson (13 December 1363 – 12 July 1429) was a French scholar, educator, reformer, and poet, Chancellor of the University of Paris, a guiding light of the conciliar movement and one of the most prominent theologians at the Council of Constance. Aged fourteen, he left Gerson-lès-Barby to study at the college of Navarre in Paris under Gilles Deschamps, (Aegidius Campensis) and Pierre d'Ailly (Petrus de Alliaco), who became his life-long friend.