Thing we were happiest to learn: John XII quickly made a powerful ally in Otto I, king of Germany and future Holy Roman Emperor. As prince of Rome, Octavianus lacked his father’s experience at keeping enemies at bay, and other Italian lords attempted to home in on the papacy’s territory. But as Pope John, he was able to recruit Otto to come to the church’s aid, crowning him Holy Roman Emperor (a title that had been vacant for 40 years) in exchange for protection. The Papal States hadn’t had such protection in a century, so it represented a diplomatic coup.

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Thing we were unhappiest to learn: John XII just as quickly made a powerful enemy of Otto I. He didn’t heed Otto’s advice to “give up his worldly and sensual lifestyle” and began to fear the power that he himself had given the new emperor. He sent envoys to the Byzantine Empire, hoping for an alliance against Otto should that relationship sour. It soured when John’s envoys were captured by Otto, who immediately learned of the duplicitous pope’s plans. Otto, who had only recently sworn to defend and protect Rome, besieged the city in 963. Pope John XII appeared in armor, leading troops to defend the city, driving Otto’s army back across the Tiber River. But he quickly realized he was outmatched and absconded with the papal treasury.

Also noteworthy: Things got messier after that. John threatened to excommunicate anyone who tried to oust him, but Otto and a council of nobles “uncanonically deposed John XII,” replacing him with Pope Leo VIII. Romans who supported John revolted, but were swiftly put down by Otto. But as soon as Otto left the city, John returned with a large enough force that Pope Leo fled. John declared Leo illegitimate, mutilated some of his enemies, as you do, and resumed his position of power. He sent a bishop to negotiate with Otto, but before anything could be resolved, John died “whilst enjoying an adulterous sexual encounter.” In one version of events, he had a stroke, and in one he was killed by the woman’s husband. Depending on which version of earlier events you believe, he was only 27 or 34. He was succeeded by Pope Benedict V, but after a month and a day, Leo VIII came back for a second run at the Holy See, ousting Benedict. After a first stint of only two months, Leo’s second papacy lasted until his death, a whole eight months later.

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Best link to elsewhere on Wikipedia: Anyone interested in more papal scandal should proceed to the list of sexually active popes, which compiles popes “known to, or suspected of” sleeping with men or women, either before or during their papacy. In fairness to the office, priests weren’t required to be celibate until the Second Lateran Council of 1139. Six popes were married, including St. Peter, whose mother-in-law is mentioned in the Gospels.

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Further down the Wormhole: Octavianus was only the third pope to change his name upon assuming the office, though he would have called himself Ioannes, the Latin form of John. The Latin language died out centuries ago, but is still widely used by the scientific community to categorize organisms using systematic names. For example, Dromaius novaehollandiae is the Latin name for the emu, the second-largest bird still in existence (only the ostrich is bigger), and the catalyst for what became known in Australia as the Emu War. We’ll remember the veterans of that conflict next week.