Pope Constantine died.
He was the final Byzantine Pope in Rome and the last one to visit Constantinople until 1967.
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Pope Gregory XIII introduced the concept of the Gregorian Calendar to Europe.
Pope Clement VII excommunicated King Henry VIII of England for his terrible behavior.
Pope Gregory XII was appointed head of the Catholic Church by a conclave of 15 cardinals in Rome.
Pope John Paul II was sent to hospital for 55 days after contracting an infection.
Pope Paul VI declared the prohibition of birth control.
