This article discusses the death of Pope Gregory XIII, who was the pope from 1572 to 1585. He is best known for introducing the Gregorian calendar, which is still used today. His death occurred on April 10, 1585 at the age of 69. It is believed that he
From Wikipedia
Pope Gregory XIII was head of the Catholic Church and ruler of the Papal States from 13 May 1572 to his death in April 1585. He is best known for commissioning and being the namesake for the Gregorian calendar, which remains the internationally accepted civil calendar to this day.