133rd Pope of the Catholic Church. Pontificate 965 - 972. After a period as bishop of Narni, he was elected Pope John XIII five months after the death of Pope Leo VIII as a compromise candidate with the agreement of Emperor Otto I (936–973). John XIII's behaviour and foreign backing made him disliked in Rome. There was a revolt that resulted in his temporary banishment in December 965, but he returned to Rome in November 966.