Pope Gregory XII was appointed head of the Catholic Church by a conclave of 15 cardinals in Rome.
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Pope John Paul IV visited New York, becoming the first Pope to visit the Western Hemisphere.
Pope Fabian succeeded Anterus and became the twentieth pope of Rome.
Pope Francis succeeds Pope Benedict XVI.
Pope Celestine V resigned after just five months in the job to return to his life as an ascetic hermit.
Pope Paschal I crowned Lothair I as the Emperor of Italy.
