Death of Saint Bertille, Abbess who led a life of austerity and prayer.
The Emperor Sigismond convenes the 16th Ecumenical Council at the Council of Constance because of the Western Schism in which there were three contemporaneous claims to papal obedience: Rome, Avignon and Pisa. It was during this council that the body of bishops voted that conciliar power supersedes the Popes and thus Pope Gregory XII was forced to renounce the Papacy. This would be corrected later at the Council of Florence.
Pope Pius XII issues his 36th encyclical Datis nuperrime which deals with the events in Hungary and the Soviets' ruthless invasion there which the Holy Father condemns.
Pope John Paul II beatifies Blessed Sister Angela of the Cross.