Overview
Pope John XII (; c. 930/93714 May 964), born Octavian, was the bishop of Rome and ruler of the Papal States from 16 December 955 to his death in 964. He was related to the counts of Tusculum, a powerful Roman family which had dominated papal politics for over half a century. He became pope in his late teenage years or early twenties. In 960, he clashed with the Lombards to the south. Unable to control Rome easily, he sought help from King Otto I of Germany and crowned him emperor. John XII's pontificate became infamous for the alleged depravity and worldliness with which he conducted his office. He soon fell out with Otto, but died before Otto succeeded in his attempt to depose him.
Family and election
Octavianus was the son of Alberic II of Spoleto, patrician and self-styled prince of Rome. His mother is believed to have been Alda of Vienne, Alberic's stepsister and the daughter of King Hugh of Italy. However, there is some doubt about this. Benedict of Soracte recorded that Octavianus was the son of a concubine (Genuit (Alberic) ex his principem ex concubinam filium, imposuit eis nomen Octabianus), but his Latin is unclear. If he was the son of Alda, he would have been 18 when he became pope, but if the son of a concubine he could have been up to 7 years older. He was born in the region of the Via Lata, the aristocratic quarter that was situated between the Quirinal Hill and the Campus Martius. His given name, evoking Augustus, was a clear indicator of how the family saw themselves and his destiny.
Sometime before his death in 954, Alberic administered an oath to the Roman nobles in St. Peter's providing that the next vacancy for the papal chair would be filled by his son Octavian, who by this stage had entered the Church. With his father's death, and without any opposition, he succeeded his father as prince of the Romans, somewhere between the ages of 17 and 24.
With the death of Pope Agapetus II in November 955, Octavian, who was the cardinal deacon of Santa Maria in Domnica, was elected his successor on 16 December 955. His adoption of the apostolic name of John XII was the third example of a pontiff taking a regnal name upon elevation to the papal chair, the first being John II (533–535) and the second John III (561–574).
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