Antoine de Challant, (about 1350 – 4 September 1418) was a Savoyard cleric who served as Chancellor of the Count of Savoy and was coopted into the papal curia by Pope Benedict XIII of the Avignon Obedience, who created him a cardinal and named him Archbishop of Moûtiers-Tarentaise. He served principally as a diplomat for the pope in negotiations directed toward the settling of the Great Western Schism, though his efforts had to be directed mostly to keeping Benedict from being repudiated by the French government. He himself finally abandoned Benedict and joined the cardinals who called for a general council of the Church. He participated in the Council of Pisa, and was one of the electors of Pope Alexander V. He also participated in the Council of Constance, and was one of the electors of