Death of Pope Marinus I, 108th successor of Peter. There was strong suspicion he was
poisoned after trying to solve quarrels between the feuding Italians.
Death of Saint Isidore, Patron Saint of Farmers. He died in Madrid, Spain, the same city where he was born and lived. Though he was extremely poor, he shared all he could with all. His wife is also a saint - Saint Maria de la Cabeza. He was known for having performed numerous miracles.
King John of England submits to Pope Innocent III. The supreme pontiff had earlier excommunicated him, but lifted that when John agreed to amend his ways as a person and monarch.
Pope Julius II leads the Papal States army, aligned with France, Spain and Germany and soundly defeated the City of Venice which he had excommunicated on April 27th of the same year.
Tough, uncompromising Pope Paul IV summonded the bishops of England to take an oath to the supremacy of Rome, but the English monarch stalled the efforts.
Cardinal Ugo Boncompagni becomes the 226th successor of Peter and takes the name Pope Gregory XIII following in the footsteps of Pope Saint Pius V. From this pontiff we get the Gregorian Calendar which he revised.