orig. Oddo Colonna
born 1368, Genazzano, Papal States
died Feb. 20, 1431, Rome
Pope (1417–31).
His election at the Council of Constance marked the end of the Western Schism . He condemned conciliar theory (see Avignon papacy ). Instead he returned to Rome (1420), where he helped to rebuild the ruined city. He also tried to recover control of the Papal States . He mediated in the Hundred Years' War and organized crusades against the Hussite s, and he asserted the rights of the church against the crown.