Death of Saint Emygdius, bishop who had been converted to Christianity after being a pagan Tueton. His quest for souls brought the wrath of the Roman Emperor Diocletian down on him and he was beheaded on this day. He is considered the patron saint for preventing earthquakes.
Death of Pope Damasus II, 151st successor of Peter. This Bavarian born pontiff took the place of his predecessor Pope Benedict IX at the request of the Emperor Henry III of Germany after Bishop Aliard of Lyons declined the papacy. Damasus ruled less than one month, retiring to Palestrina where he died.
The election of Pope Urban VI, 202nd successor of Peter and elected on April 18, 1378, is declared nul and void by the majority of French cardinals who advise Urban to abdicate. When the Pope refuses they set about to elect three months later on October 31 the antipope Clement VII thus putting into motion the Great Schism of the west.
Pope Sixtus IV celebrates the first Mass in the new Sistine Chapel which he built. It would later be decorated by the great master Michelangelo and has served as the cloistered conclave for the College of Cardinals during the election of the Pope.