Death of Pope Saint Sylvester I, 33rd successor of Peter. This Roman-born pontiff was the first to wear the Tiarra and called the First Ecumenical Council at Nicea where the "Creed" was formulated. It was St. Sylvester who instituted Sunday as the Sabbath in recognition of the Resurrection of Our Lord. Ever mindful of the passion, he established the "Iron Crown" using a nail from the Holy Cross founded by Saint Helena in Jerusalem during her son Constantine's reign.
Death of Saint Melania the Younger, daughter of a Roman Senator who endowed and founded monasteries for men and women in Numidia and the Holy Land. She is widely venerated by Latin Catholics in Constantinople and Jerusalem.
Birth of Alfonso de Borgia in Jativa, Spain. He would go on to become a cardinal priest and the 209th successor of Peter on April 8, 1455 as Pope Callistus III He would be responsible for the growth of Christianity in Scandinavia. It would be this Spanish-born pontiff who would order the ringing of the bells at midday each day, establishing the tradition of the Angeles and it was Callistus III who would institute the Feast of the Transfiguration.
Birth of Henri Guise, French duke and leader of the Catholic League.
Pope Pius XI releases his fourteenth encyclical Rappresentanti in terra on Christian education which would be published several months later with minor alterations to the Latin text Divini illius magistri.
Pope Pius XI publishes his sixteenth encyclical Casti connubii on Christian marriage and the dangers of mixed marriages.