John Crescentius Installs Pope John XVII in Rome (1003)
On May 16, 1003, the Roman patrician John Crescentius exercised his near-total grip on the city by installing a new pope, John XVII, just days after the death of Pope Sylvester II. The move revealed how thoroughly the aristocratic Crescentii family had come to dominate the papacy following the collapse of imperial oversight in Rome, foreshadowing decades of turbulent church-state relations.
The Rise of the Crescentii Dynasty
John Crescentius inherited enormous power in Rome upon the death of his father, Crescentius the Younger, in 1002, succeeding him as consul and patrician of the city. The Crescentii family had spent the late 10th century building a dynasty of secular control over Rome, often clashing with the Holy Roman Emperors who claimed authority over the papacy. The elder Crescentius had notoriously seized Rome in 998, installing an antipope against Emperor Otto III's wishes, an act that ended in brutal imperial reprisal and his own execution. Despite this violent precedent, the family's influence proved resilient. When Otto III died suddenly in January 1002 at just twenty-one years old, the imperial counterweight to Roman noble power vanished almost overnight. John Crescentius moved quickly to fill the resulting vacuum, consolidating the family's grip on the city's civic and religious institutions. By early 1003, he effectively controlled Rome's government, and crucially, held significant sway over who would occupy the papal throne. His authority rested not on any formal ecclesiastical office but on raw political dominance, military backing from Roman factions, and the absence of a strong external check. This period exemplified the broader pattern of the 10th and early 11th centuries, sometimes called the 'pornocracy' or rule of the nobles, during which powerful Roman families treated the papacy as an extension of their own political ambitions rather than an independent spiritual authority.
Did You Know?
Pope John XVII, installed by John Crescentius, had been married before joining the priesthood and had fathered three sons who all went on to become priests themselves, an arrangement considered unremarkable in an era before clerical celibacy was strictly enforced.
Choosing Pope John XVII
When Pope Sylvester II died in Rome, John Crescentius acted swiftly to ensure continuity of his influence over the Holy See. On May 16, 1003, he selected Siccone, a Roman priest, to become the next pope, who took the name John XVII. Unusually for a man who would hold the highest office in the Latin Church, John XVII had been married before entering the priesthood and had fathered three sons, all of whom themselves became priests, a reminder that clerical celibacy was not yet uniformly enforced or practiced at this stage of church history. His selection reflected Crescentius's preference for a pliable candidate whose loyalty to the ruling family in Rome outweighed independent ambition. John XVII's pontificate, however, proved remarkably brief. He held the papal office for roughly five to seven months, dying by early December of the same year, 1003. Little of substance survives regarding major decisions or reforms undertaken during his short tenure, largely because contemporary chroniclers focused more attention on the political maneuvering surrounding his installation than on his actual governance. His rapid death opened the door for Crescentius to select yet another successor, Pope John XVIII, continuing the pattern of rapid, family-controlled papal turnover that characterized this uneasy period in the history of the Roman church.
Legacy of Noble Control Over the Papacy
The events of May 1003 illustrate a broader crisis in medieval church governance that would eventually spark major reform. John Crescentius's ability to handpick popes with little resistance underscored how thoroughly secular power had infiltrated the highest levels of ecclesiastical authority. This arrangement persisted for years, with the Crescentii family maintaining substantial control over Rome and its bishops throughout the early 11th century. It was not until 1013, when Emperor Henry II intervened militarily and diplomatically, that imperial authority was reasserted over the city, curbing Crescentius's power and restoring a measure of external oversight to papal elections. The broader pattern exemplified by John Crescentius's actions, wealthy noble families treating the papacy as a family possession, became a rallying point for the Gregorian Reform movement later in the 11th century. Reformers, drawing partly on memories of episodes like this one, pushed for the papacy's independence from secular and aristocratic interference, eventually leading to the establishment of the College of Cardinals as the sole body responsible for papal elections in 1059. In this sense, the brief and largely forgotten pontificate of John XVII, installed at the whim of a Roman strongman, stands as a small but telling episode in the long history of tension between secular power and spiritual authority that would define much of medieval European politics.