The Real History of the Papal States

The Pope as Prince

For more than a thousand years, the bishop of Rome was also a territorial ruler. The Papal States, which at their height stretched across much of central Italy, were governed by the papacy as a sovereign political entity: collecting taxes, raising armies, making war, signing treaties, and executing criminals. The Pope was not just a spiritual leader. He was a prince, and in the brutal world of medieval and early modern Italian politics, that meant behaving like one.

This history is uncomfortable for those who prefer their religious institutions purely spiritual, and it has been quietly minimized in popular accounts of the Church. But the Papal States were a defining fact of European history for over a millennium, shaping Italian culture, politics, and eventually the unification movement that swept them away in the 19th century.

The Donation of Pepin and the Founding Myth

The origin story of the Papal States begins with a document and a military campaign. In 754, the Frankish king Pepin III crossed the Alps to defend the papacy against the Lombards, a Germanic people who had been pressing on Rome for decades. After his victory, Pepin handed over a swath of central Italian territory to Pope Stephen II, a gift recorded as the Donation of Pepin. This is conventionally taken as the founding of the Papal States.

But the papacy grounded its territorial claims on an older document: the Donation of Constantine, which purported to show that the Emperor Constantine himself had granted the Pope temporal authority over Rome and the western empire in the 4th century. The Donation of Constantine was a forgery. It was probably fabricated in the 8th century, within living memory of the Donation of Pepin, as a way of giving the papal territorial claim imperial-level legitimacy.

The Italian humanist Lorenzo Valla proved the document was a forgery in 1440, using linguistic analysis to show that its Latin was inconsistent with 4th-century usage. The Church eventually acknowledged this. But for seven centuries, the Donation of Constantine had been cited as legal and theological justification for papal temporal power. A fake document shaped a real empire.

The Carolingian Alliance and the Papal States' Early Shape

Pepin's son Charlemagne deepened the alliance. His coronation as Holy Roman Emperor by Pope Leo III on Christmas Day, 800 CE, created a relationship between papal and imperial authority that would generate conflict and cooperation for the next thousand years. The papacy gained a protector. Charlemagne gained religious legitimacy. Both sides understood they needed each other.

Within that alliance, the Papal States developed their basic territorial shape: Rome and the region around it, the Duchy of Spoleto, the Romagna (the flatlands south of the Po), the Marches on the Adriatic coast. The geography was not uniformly controlled. Local lords, city communes, and various powers frequently contested papal authority over specific territories. The history of the Papal States is in large part a history of the papacy trying to actually govern places where it had theoretical jurisdiction but often limited practical control.

The Avignon Period: When the Pope Left Rome

From 1309 to 1377, the papacy did not sit in Rome at all. The popes lived in Avignon, in what is now southern France, under conditions that amounted to French political influence if not outright domination. The Avignon popes were all French. The College of Cardinals became predominantly French. The papacy's fiscal operations became increasingly sophisticated and increasingly resented.

For the Papal States, this was a period of near-collapse. Without papal authority present in Rome, the city descended into factional warfare between the great Roman noble families, particularly the Colonna and the Orsini. Bandits controlled the roads. The Romagna and the Marches were effectively lost to local warlords. When Pope Gregory XI finally returned the papacy to Rome in 1377, his administrators had to reconquer much of the Papal States territory by force.

The reconquest was led by Cardinal Albornoz, one of the most capable military and administrative minds the medieval Church produced. He reimposed papal authority across central Italy, built fortresses, revised the legal framework of papal governance, and left behind a Papal States that was actually governable, rather than just notionally sovereign.

Renaissance Popes: Art, War, and Nepotism

The Renaissance papacy is famous for its art patronage, and it should be. The Sistine Chapel ceiling, St. Peter's Basilica, and enormous amounts of what is now considered the greatest art in the Western tradition were products of papal investment. What gets less attention is how that investment was funded and at what political cost.

The Renaissance popes were Italian princes who happened to hold the papal office. Alexander VI (Rodrigo Borgia) used the papacy primarily to advance his family's political ambitions, arranging marriages and military campaigns to benefit his son Cesare and daughter Lucrezia. Julius II personally led armies into battle, wearing armor over his papal robes. Leo X (Giovanni de' Medici) spent so lavishly on culture and war that he accelerated the financial crisis that produced the sale of indulgences that triggered Martin Luther's revolt in 1517.

The Papal States during this period functioned as a resource extraction system for the papacy's political and cultural ambitions. Taxation was heavy. Governance was inconsistent. The populations of the Romagna and the Marches were governed by legates (papal representatives) of varying competence and honesty. Some were capable administrators. Others were primarily interested in enriching themselves and their families.

The Counter-Reformation and the Attempt at Moral Reform

The Protestant Reformation forced the papacy into a genuine reckoning. The Council of Trent (1545-1563) produced serious theological and administrative reform. The papacy that emerged from the Counter-Reformation was more disciplined, more doctrinally rigorous, and more concerned with its moral image. The wild nepotism and open corruption of the Renaissance papacy became less acceptable.

Within the Papal States, this translated into more systematic governance. The papacy invested in administrative infrastructure, standardized legal codes, and institutions of higher learning. Rome itself was rebuilt on a grander scale, with wide avenues and dramatic baroque churches, projecting the image of a Church that had survived its crisis and emerged stronger.

But the fundamental problem of the Papal States remained: they were governed by an institution whose primary mission was spiritual, by officials whose careers were determined by ecclesiastical rather than administrative competence, and whose head was selected by a process (papal election) that bore no relation to governing capacity. The Papal States produced some able administrators, but the structural incentives did not reliably produce good governance.

Napoleon and the End of the First Era

Napoleon Bonaparte treated the Papal States with contempt. His Italian campaign of 1796-1797 forced the papacy to sign the Treaty of Tolentino, ceding large portions of the Papal States and paying an enormous financial indemnity. In 1798, French forces occupied Rome and declared a Roman Republic. Pope Pius VI was taken prisoner and died in French captivity in 1799.

The Congress of Vienna in 1815 restored the Papal States after Napoleon's defeat. But the restoration was uncomfortable. The Papal States were now surrounded by Napoleonic ideas about national self-determination, constitutional government, and popular sovereignty. Liberal and nationalist movements in the Romagna and the Marches repeatedly challenged papal authority throughout the first half of the 19th century. The papacy responded with repression, often aided by Austrian military force.

The Risorgimento and the Final Collapse

Italian unification, the Risorgimento, was incompatible with the Papal States. The unified Italian state that Cavour, Garibaldi, and Victor Emmanuel II were building required Rome as its capital. Rome was the property of the Pope. The collision was inevitable.

In 1860, Piedmontese forces annexed most of the Papal States after defeating the papal army at the Battle of Castelfidardo. What remained was Rome and the immediate surrounding region, protected by a French garrison. When the Franco-Prussian War forced France to withdraw that garrison in 1870, Italian forces entered Rome through a breach in the Aurelian Wall at Porta Pia on September 20, 1870. The Papal States, after more than a thousand years, ceased to exist.

Pope Pius IX withdrew into the Vatican and declared himself a prisoner. The so-called Roman Question, the unresolved status of the Pope's territorial claims, persisted until the Lateran Treaty of 1929, when Mussolini and the Vatican settled the matter by creating Vatican City as an independent state. The papacy got 44 hectares and international recognition of its sovereignty. Italy kept Rome.

What the Papal States Left Behind

A thousand years of territorial governance left a complicated legacy. The regions of the former Papal States, particularly the Romagna, developed a notably anticlerical political tradition that persisted into the 20th century and contributed to the early strength of Italian socialism and communism. The experience of being governed by the Church produced, in many cases, a determined hostility to Church authority in civic life.

Administratively, the Papal States left central Italy comparatively underdeveloped compared to the more commercially dynamic north. The Church was not, structurally, an ideal governing entity for an era of industrial capitalism and constitutional government. Its legacy in the regions it governed was mixed at best.

What the Papal States also demonstrated, over a very long time, is that the combination of spiritual and temporal authority tends to corrupt both. The Church's credibility as a moral institution was damaged repeatedly by its behavior as a political one. The Renaissance popes are remembered as much for their wars and their children as for their theology. That tension never fully resolved itself, which is why the final loss of the Papal States was, for the institutional Church, also something of a relief.