Pope John XII: Exploring His Scandalous Life and Era
- 27 December 2023
- 2 Comments
- 14 Min Read
Article Update: 23 October 2025
Pope John XII: The Teenage Pope
Pope John XII depicted in a 16th-century engraving contained in the Pontificum Romanorum effigies by Giovanni Battista de’Cavalieri
Introduction
In May 964, Pope John XII’s life met a lurid end befitting his notorious reputation. According to one chronicler, the 27-year-old pope suffered a fatal stroke in the midst of an adulterous tryst, collapsing in the bed of a married woman; another rumour claimed an irate husband burst in and threw the young pope out a window to his death. Such was the dramatic finale of a papacy filled with intrigue and scandal.
Pope John XII, originally known as Octavian (around 930/937–14 May 964), led the Papal States and the Church in Rome from December 16, 955, until his passing in 964. He was part of the Tusculum family, a prominent Roman dynasty that had been influential in church matters for more than 50 years. John XII became pope in his late teens or early twenties, a remarkably young age for a position of such significance. Around 960, he found himself in conflict with the Lombards in the south. Governing Rome proved challenging for him, leading him to seek assistance from King Otto I of Germany, whom he eventually crowned as emperor. John XII’s papacy was marked by controversies, with numerous stories circulating about his lavish lifestyle and questionable conduct in office. His relationship with Otto deteriorated over time, and though Otto planned to remove him, John XII died before these plans came to fruition. His reign is remembered for its dramatic events and intrigue surrounding it.
As the renowned historian Ferdinand Gregorovius reflected on John XII’s extraordinary rise:
The papal throne had never before been filled by one so young and so unfitted for the office by experience or character.
Early Life and Family Background
Octavianus, later known as Pope John XII, was born into the aristocracy as the son of Alberic II of Spoleto, a patrician and self-declared prince of Rome. His mother is thought to be Alda of Vienne, the daughter of King Hugh of Italy and stepsister to Alberic. However, there’s some uncertainty here; historical records, including those by Benedict of Soracte, suggest that Octavian might have been the son of a concubine, which would make his birth year ambiguous. He was named Octavianus, a name resonant with imperial connotations, hinting at his family’s lofty aspirations for him.
Path to Papacy
Before Alberic died in 954, he ensured that the Roman nobility would support Octavianus as his successor and future pope. Upon his father’s passing, Octavianus, aged between 17 and 24, smoothly took over as prince of the Romans.
Ascension to the Papacy
The death of Pope Agapetus II in November 955 set the stage for Octavianus’s rise. As the cardinal deacon of Santa Maria in Domnica, he was elected pope on December 16, 955. Adopting the papal name John XII, he became the third pope to change his name upon assuming the papacy. Interestingly, he used his birth name, Octavianus, for secular matters and John XII for ecclesiastical affairs.
Octavianus’s rise was unprecedented—not only was he the scion of the powerful Tusculum dynasty, but at just around eighteen years old, he became the youngest pope in history. This extraordinary youth and lack of experience would soon become apparent in the tumultuous years that followed.
Military Actions and Alliance with Otto I
Map of Holy Roman Empire c.1000 AD
Early Military Endeavours
Around 960, Pope John XII personally led a military campaign against the Lombard duchies of Beneventum and Capua. His goal was to recover territories of the Papal States that were lost to them. However, faced with the might of John’s forces from Tusculum and Spoleto, the Lombard dukes sought help from Gisulf I of Salerno. John subsequently retreated north and negotiated a treaty with Gisulf at Terracina, renouncing the papacy’s claim on Salerno.
Challenges in Rome and Italy
Despite his military efforts, John found managing the powerful Roman nobility challenging, a task his father had handled with ease. Concurrently, King Berengar II of Italy began to threaten the pope’s territory. To safeguard against political plots in Rome and Berengar’s aggression, John sought the support of King Otto I of Germany in 960. Otto, already recognised as a patrician, responded to John’s call, entering Italy in 961 and forcing Berengar into retreat.
The Alliance with King Otto
Upon Otto’s arrival in Rome on January 31, 962, he swore an oath to Pope John XII, vowing to defend the pope and the Holy Roman Church. He pledged not to enact any laws within Rome without John’s consent and to return any conquered territory of St. Peter to the papacy.
Crowning of an Emperor
John XII then crowned Otto as emperor, marking the first such coronation in the West since Berengar I’s death nearly four decades earlier. The pope and Roman nobility swore allegiance to Otto over Saint Peter’s relics, agreeing not to support Berengar II or his son Adalbert.
The Diploma Ottonianum
Eleven days after the coronation, John and Otto ratified the Diploma Ottonianum. This agreement made Otto the protector of the Papal States, stretching from Naples to Venice. This was the first effective protection since the Carolingian Empire’s fall. The agreement also confirmed the freedom of papal elections, with the provision that the emperor must approve the election before the papal consecration. Additionally, it upheld certain clauses of the Constitutio Romana, limiting the pope’s temporal power.
The Tumultuous Alliance: John XII and Otto the Great
The alliance between John XII and Otto the Great shaped the fate of the Holy Roman Empire. Their initial cooperation—culminating in Otto’s imperial coronation—soon gave way to rivalry, betrayal, and a dramatic power struggle for control over Rome and the papacy.
Ecclesiastical Engagements Amid Secular Controversies
Pope John XII’s Involvement in Church Affairs
Despite his reputation for secular indulgences, Pope John XII did engage in some ecclesiastical activities. In early 956, he reached out to William of Mayence, the papal legate in Germany. His letter encouraged William to persist in his efforts, particularly against those threatening the sanctity of the churches. He also requested updates on developments in West Francia and Germany.
Encouraging Episcopal Leadership
John XII corresponded with Henry, the newly appointed archbishop of Trier. In his letter, he granted Henry the pallium, a symbol of episcopal authority, and urged him to lead a virtuous life.
Supporting Religious Institutions
In 958, Pope John XII granted privileges to Subiaco Abbey. He stipulated that priests and monks should daily recite prayers for the welfare of their souls and those of their successors. Additionally, he required the offering of Holy Mass three times a week for the same intention.
Recognition of Church Leaders
John XII’s tenure saw the confirmation of Saint Dunstan as the archbishop of Canterbury in 960. Dunstan travelled to Rome to receive the pallium directly from Pope John XII.
Synod of 962 and Church Decisions
On February 12, 962, at Emperor Otto’s request, John convened a synod in Rome. This synod made significant decisions: it established the Archbishopric of Magdeburg and the Bishopric of Merseburg, conferred the pallium on the archbishops of Salzburg and Trier, and confirmed Rather’s appointment as bishop of Verona. It also marked the excommunication of Bishop Hugh of Vermandois for attempting to reclaim his archbishopric of Reims. This excommunication was reaffirmed at a subsequent synod in Pavia later in the year.
Historical Perspective
According to historian Horace Kinder Mann, Pope John XII seemed to have limited interest in ecclesiastical matters, indicating a prioritisation of secular over spiritual responsibilities.
John XII’s Political Intrigue and Demise
Emperor Otto I
Otto’s Departure and John’s Defiance
After Otto I left Rome on February 14, 962, to confront Berengar II, he advised John XII, known for his indulgent life, to abandon his extravagant and adulterous ways. John XII ignored this counsel. As Otto quickly subdued Berengar in the Papal States, John’s unease grew. Fearing Otto’s increasing power, he sought alliances against Otto, reaching out to the Magyars and the Byzantine Empire and even negotiating with Berengar’s son, Adalbert.
Otto’s Discovery and Siege of Rome
Otto I, learning of John’s secret negotiations, sent a delegation to Rome to investigate. Meanwhile, John sent envoys, including the future Pope Leo VIII, to assure Otto of his intentions to reform. However, in 963, Otto discovered Adalbert’s presence in Rome for talks with John. With Berengar defeated, Otto besieged Rome in the summer of 963. The city was divided: supporters of John held the old Leonine City, while Otto’s allies fortified themselves in Joannispolis. Initially, John, in full armour, repelled Otto’s forces but eventually fled with the papal treasury and Adalbert to Tibur.
Council, Deposition, and Turmoil
Otto convened a council, demanding that John defend himself against various charges. John threatened excommunication to anyone trying to depose him. Unfazed, Otto and the council deposed John, who was hunting in Campania, and elected Pope Leo VIII. A revolt in Rome supporting John was quashed, but upon Otto’s departure, John returned, forcing Leo VIII to seek Otto’s protection. Back in power by February 964, John convened a synod, declared his deposition invalid, and regained control after punishing his enemies.
John’s Mysterious Death and Aftermath
Before reaching any agreement with Otto, John XII died on May 14, 964. His death, according to Liudprand of Cremona, occurred during an illicit affair outside Rome, possibly due to a stroke or a vengeful husband. John XII was buried in the Lateran, followed by Pope Benedict V’s brief papacy before Leo VIII reclaimed the papal seat.
The Dual Roles and Scandals
Pope John XII’s reign unfolded during the 10th-century papal scandals known as the Saeculum Obscurum—a period when the Roman papacy was infamous for its moral and political crises. His own actions, from alleged corruption to flagrant immorality, would earn him a lasting place among the era’s most controversial pontiffs.
John XII’s Dual Role and Controversial Behaviour
John XII’s tenure as both the secular prince of Rome and the spiritual leader of the church was marked by a leaning towards his secular duties. His behaviour, often described as coarse and immoral, suggested a lifestyle more fitting for a secular prince. The Lateran Palace was reputedly akin to a brothel under his rule, and his actions were a source of widespread disgrace. Accusations of moral corruption were frequently used by his political enemies to tarnish his reputation, thereby muddying the political aspects of his eventual deposition.
Accusations at the Synod of Rome
The Synod of Rome in 963, spearheaded by Liudprand of Cremona, an ally of Holy Roman Emperor Otto I, brought various charges against John XII. These included irregularities in religious practices and ordinations, as well as allegations of bribery, adultery, and other serious misdeeds. His behaviour was characterised by blatant disregard for ecclesiastical norms, ranging from public hunting expeditions to violent acts and sacrilegious behaviour. Liudprand even accused the young pope of gambling and invoking Jupiter and Venus while playing dice and, separately, of debauching the Lateran Palace. Such behaviour reflected not only his personal excess but also how deeply dice-based games of chance had penetrated medieval society despite clerical bans. As the chronicler and diplomat Liudprand of Cremona—an eyewitness to the synod that deposed John—bluntly recorded:
He turned the Lateran palace into a brothel and lived more like a warlord than a pontiff.
Contemporary Criticism and Condemnation
Other contemporaries also decried John XII’s behaviour. Ratherius of Verona questioned the morality of electing someone with such a lifestyle to the See of the Apostles. The extreme condemnation that followed John XII’s papacy was largely based on these recorded accusations, with figures like Louis Marie DeCormenin harshly criticising him. According to DeCormenin, John XII’s actions made him one of the most wicked popes.
Historical Perspectives on John XII
Historians have varied in their assessment of John XII. Ferdinand Gregorovius noted the conflict between John’s princely instincts and spiritual duties, suggesting a lenient view considering his youth and the challenges of his dual role. However, even Horace Mann, known for defending the papacy, conceded that John XII’s actions were far from what was expected of a pope.
Legend of Pope Joan
In a detailed annotation of Bartolomeo Platina’s work on the popes, Onofrio Panvinio proposed that the Pope Joan myth might have originated from tales about John XII. Panvinio pointed out John XII’s promiscuous behaviour, highlighting that among his many mistresses, there was one named Joan who wielded significant influence in Rome during his papacy. This connection, according to Panvinio, could have inspired the legendary narrative of ‘Pope Joan’.
The 19th-century historian Louis Marie DeCormenin summarised John XII’s legacy with these searing words:
A robber, a murderer, and a parricide—the most wicked of popes ever enthroned in Rome.
Frequently Asked Questions
Who was Pope John XII, and why is he considered controversial?
Pope John XII, born Octavian, became pope as a teenager and was infamous for his scandalous lifestyle, political intrigues, and the turbulent events of his papacy—including his alliance and later conflict with Otto I.
Was Pope John XII the youngest pope in history?
Yes, Pope John XII is widely regarded as the youngest pope in history, ascending to the papacy at around 18 years old.
What were the main scandals of the 10th-century papacy?
The 10th century, known as the Saeculum Obscurum, was marked by widespread papal corruption, nepotism, and immoral behaviour among popes—including John XII, whose reign epitomised the era’s scandals.
What was the relationship between John XII and Otto the Great?
Initially allies, with John XII crowning Otto I as Holy Roman Emperor, their relationship soured over power struggles, leading to John’s deposition and one of the most dramatic conflicts between pope and emperor in medieval history.
How did Pope John XII die?
Pope John XII died suddenly at the age of 27, reportedly during an adulterous affair, with some chroniclers claiming his death was the result of a stroke or a violent reprisal.
What is the connection between Pope John XII and the legend of Pope Joan?
Some historians speculate that the scandalous tales surrounding John XII, including his mistress, Joan, may have contributed to the later legend of Pope Joan—a supposed female pope now considered a medieval myth.
Did a woman ever become pope?
No, there is no credible historical evidence that a woman ever served as pope. The Pope Joan story is regarded by most scholars as a legend with no basis in fact.
Recommended Reading
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Documentary
Source: (Time Capsule, 2023)
Sources
Time Capsule. (2023). The Unbelievable Things Pope John XII Did [YouTube Video]. In YouTube. https://www.youtube.com/watch?v=OldkmvzFTv4
Chamberlin, R. (2003). The Bad Popes. Sutton Publishing.
DeCormenin, L. M., & Gihon, J. L. (1857). A Complete History of the Popes of Rome, from Saint Peter, the First Bishop to Pius the Ninth.
Gregorovius, F. (1895). The History of Rome in the Middle Ages, Vol. III. G. Bell & Sons.
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Luciano Anastasi
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How long did they fight for? How old was King Otto the Great when he was crowned king? Does King Otto have kids? How many kids does King Otto have? Does Pope John XII have kids? How many kids does Pope John XII have? How long did Pope John XII live for? How old was King Otto when he died?
Does Pope John XII have kids? Yes, Pope John XII was infamous for his scandalous behavior, including fathering illegitimate children, which was highly controversial for a pope.
How many kids does Pope John XII have? The exact number of Pope John XII’s children is not definitively known due to limited and biased historical records, but he is reported to have had multiple illegitimate children.
How long did Pope John XII live for? Pope John XII lived for about 27 years, from his birth in 937 to his death in 964.