A History of the Papacy

• Introduction
• Chapter 1 The Petrine See: The Origins of Papal Authority
• Chapter 2 The Papacy and the Roman Empire: From Persecution to Primacy
• Chapter 3 The Age of Gregory the Great: Shaping the Medieval Papacy
• Chapter 4 Forging Alliances: The Papacy and the Rise of the Franks
• Chapter 5 The Iron Century: The Papacy in an Age of Anarchy
• Chapter 6 The Gregorian Reform: The Papacy's Struggle for Independence
• Chapter 7 The Crusades: The Pope as a European Power Broker
• Chapter 8 The Height of Papal Power: Innocent III and the Apex of the Medieval Papacy
• Chapter 9 The "Babylonian Captivity": The Avignon Papacy
• Chapter 10 The Great Western Schism: A Divided Church
• Chapter 11 The Renaissance Popes: Patrons of the Arts and Political Players
• Chapter 12 The Borgias and the Medici: Power and Corruption in the Papal Court
• Chapter 13 The Reformation: The Papacy Under Attack
• Chapter 14 The Council of Trent and the Counter-Reformation: The Catholic Response
• Chapter 15 The Baroque Papacy: The Splendor of Papal Rome
• Chapter 16 The Enlightenment and the Papacy: A Clash of Ideas
• Chapter 17 The Papacy and the Age of Revolution: The Church in a Time of Upheaval
• Chapter 18 The Loss of the Papal States: The Pope as a "Prisoner in the Vatican"
• Chapter 19 The First Vatican Council: The Dogma of Papal Infallibility
• Chapter 20 The Papacy and the World Wars: Moral Authority in a Time of Crisis
• Chapter 21 The Second Vatican Council: The Church Opens its Windows to the Modern World
• Chapter 22 The Traveling Pope: John Paul II and the Global Papacy
• Chapter 23 The Pope Emeritus: The Resignation of Benedict XVI
• Chapter 24 A Pope from the "New World": The Pontificate of Francis
• Chapter 25 The Papacy in the 21st Century: Challenges and the Future

There is no institution in the world quite like the Papacy. It is, to begin with, ancient. The historian Thomas Babington Macaulay, writing in 1840, noted with a mixture of Protestant skepticism and historical awe that "the proudest royal houses are but of yesterday, when compared with the line of the Supreme Pontiffs." He traced that unbroken line from the pope who crowned Napoleon in his own lifetime back to the one who crowned Pepin in the eighth century, and "far beyond the time of Pepin the august dynasty extends, till it is lost in the twilight of fable." That line, which Catholics believe begins with the Apostle Peter in the first century, has persisted through the collapse of the Roman Empire, the turmoil of the Dark Ages, the rebirth of the Renaissance, the schism of the Reformation, the philosophical upheaval of the Enlightenment, the devastation of two World Wars, and the dizzying technological advances of the modern era. While empires, kingdoms, and entire civilizations have risen to glory and crumbled into dust, the Papacy remains.

It is this sheer, stubborn persistence that makes the Papacy a subject of endless fascination, not just for the more than one billion Catholics who look to the pope as their spiritual leader, but for people of all faiths and none. It is arguably the oldest continuously functioning institution in the Western world, a living link between the age of the Caesars and the age of the internet. Its history is, in many ways, the history of Western civilization itself, a grand, sprawling epic filled with saints and sinners, scholars and warriors, artists and politicians, all of whom have occupied the throne of St. Peter. This book is an attempt to tell that epic story, to navigate the two-thousand-year journey of this remarkable institution.

The man at the center of this story is the pope himself, a figure who holds a truly unique position in the world. He is the Bishop of Rome, the spiritual head of the Catholic Church, the absolute sovereign of the world's smallest independent state, Vatican City, and a global figure whose moral authority extends far beyond the walls of his tiny kingdom. The titles he holds are a testament to the layers of history and theology that surround his office: Supreme Pontiff, Vicar of Christ, Successor of the Prince of the Apostles. The term "pope" itself derives from the Greek word pappas, meaning "father," a title once applied to all bishops but which, since the 11th century, has been reserved for the Bishop of Rome alone. The word "pontiff," in turn, comes from the Latin pontifex, meaning "bridge-builder," a title once held by the high priests of ancient Rome, suggesting a role as a mediator between the human and the divine.

This book is not, however, a work of theology. It is a work of history. While we will necessarily touch upon the religious doctrines that underpin papal authority—most notably, the belief in apostolic succession from St. Peter—our primary focus will be on the human story of the Papacy. We will examine how this office, which began with a fisherman in Roman-occupied Judea, evolved over centuries into a powerhouse of spiritual and, for a time, temporal and political influence. We will explore the complex, often fraught relationship between the popes and the great powers of the day, from Roman emperors and Byzantine autocrats to Frankish kings and Holy Roman Emperors.

The narrative of the Papacy is one of dramatic and often startling contradictions. It is a story of profound faith and base political calculation, of immense artistic patronage and brutal military campaigns. The men who have worn the papal tiara have been a varied lot, a reflection of the best and worst of humanity. The list of over 260 popes includes some of history's most revered saints, brilliant administrators, and profound thinkers. Men like Leo the Great, who faced down Attila the Hun; Gregory the Great, who laid the foundations for the medieval Papacy amidst the ruins of the Roman world; and John Paul II, who traveled the globe and played a crucial role in the collapse of communism.

Yet, the same office has been occupied by individuals whose reigns were marked by scandal, corruption, and violence. There have been popes who fathered children, waged wars for personal gain, and engaged in the most cynical forms of power politics. The "Iron Century" of the Papacy in the 10th century, for instance, was a period of such degradation that it became the plaything of rival Roman aristocratic factions, with popes being installed and deposed, imprisoned, and even murdered with alarming regularity. One pope, Stephen VI, famously had the corpse of his predecessor, Formosus, exhumed, dressed in papal vestments, and put on trial. The infamous Renaissance popes, such as Alexander VI of the Borgia family, presided over a court that was more princely than priestly, a hub of intrigue and artistic splendor in equal measure.

To write a history of the Papacy is therefore to embrace these contradictions. It is to tell the story of an institution that has, at various times, been a beacon of spiritual guidance, a preserver of ancient learning, a patron of sublime art, a major political player in European affairs, and an obstacle to scientific and social progress. It has launched Crusades, authorized Inquisitions, and convened councils that have reshaped the course of Christianity. It has wielded the spiritual weapons of excommunication and interdict to bring kings and emperors to their knees, and it has found itself a helpless pawn in their games of power politics.

This book will trace the long and winding path of papal history, from its humble and obscure beginnings in the city of Rome, the very heart of the empire that would execute its first leader. We will begin with the fragile Christian community of the first centuries, a persecuted minority whose bishops in Rome were more likely to end up as martyrs than as power brokers. We will see how the conversion of Emperor Constantine in the fourth century dramatically altered the Church's fortunes, elevating the Bishop of Rome to a position of prominence and laying the groundwork for future claims to authority.

Our journey will take us through the so-called Dark Ages, where popes like Gregory the Great stepped into the power vacuum left by the fallen Western Roman Empire, taking on civil responsibilities and forging a new identity for the Papacy as a force for order in a chaotic world. We will examine the crucial alliance forged with the Franks, culminating in Pope Leo III's momentous crowning of Charlemagne as emperor on Christmas Day in 800, a move that would bind the destiny of the Papacy to that of Western Europe for centuries to come.

We will then delve into the high Middle Ages, the era of the Papacy's greatest temporal power. We will explore the Gregorian Reform movement, a fierce struggle to free the Church from the control of secular rulers, and the Crusades, which saw popes acting as the leaders of a united Christendom. This period reached its zenith with the pontificate of Innocent III, a pope who could plausibly claim to be the overlord of all European monarchs.

But power is fleeting. We will follow the Papacy's decline into the "Babylonian Captivity" of the Avignon Papacy, where for nearly seventy years the popes resided in France, widely seen as puppets of the French crown. This was followed by the even greater catastrophe of the Great Western Schism, a period when two, and eventually three, rival popes claimed legitimacy, dividing the loyalties of a bewildered Europe and severely damaging papal prestige.

The Schism was eventually healed, but the Papacy that emerged was a different creature. The Renaissance Popes were often more concerned with consolidating their Italian territories—the Papal States—and beautifying Rome than with spiritual leadership. They were among the greatest patrons of the arts the world has ever known, commissioning masterpieces from the likes of Michelangelo and Raphael, but their worldliness and the corruption that plagued the papal court helped to fuel the flames of the Protestant Reformation.

The Reformation was the greatest crisis in the Papacy's history, shattering the religious unity of Western Europe and challenging the very foundations of papal authority. We will explore the Catholic Church's response in the Counter-Reformation and the Council of Trent, a period of spiritual renewal and doctrinal clarification that would shape the Papacy for the next four hundred years.

From there, our narrative will move into the modern era, an age of new and profound challenges. We will see how the Papacy contended with the rise of nationalism, the Enlightenment's critique of religion, and the cataclysm of the French Revolution, which saw the Church stripped of its wealth and power. The 19th century brought the loss of the Papal States and the unification of Italy, leaving the pope a self-proclaimed "prisoner in the Vatican." Paradoxically, as the Papacy's temporal power vanished, its spiritual authority grew, culminating in the declaration of papal infallibility at the First Vatican Council.

The final chapters of this book will bring the story up to the present day, examining the Papacy's role in the tumultuous 20th century, a period marked by world wars, totalitarian ideologies, and genocide. We will look at the landmark Second Vatican Council, which sought to open the Church's windows to the modern world, and the globetrotting pontificate of John Paul II, who transformed the Papacy into a truly global institution. We will consider the historic resignation of Pope Benedict XVI and the subsequent election of Pope Francis, the first pope from the Americas, who has brought a new style and focus to this ancient office.

This is a story of an institution that has had to constantly reinvent itself to survive. It has adapted to shifting political landscapes, navigated treacherous theological disputes, and responded to the changing needs and expectations of its followers. The Papacy of the 21st century, with its active presence in international diplomacy and on social media, is a world away from the persecuted community of the first century or the quasi-imperial court of the Middle Ages, yet an unbroken chain connects them all.

To understand the history of the Papacy is to understand a central thread in the tapestry of world history. Its influence is not confined to the religious sphere; it has shaped law, politics, art, music, and literature. It has been a force for both unity and division, for progress and reaction. This book aims to present this complex and multifaceted history in a straightforward and engaging manner. It is a human story, with all the drama, tragedy, and occasional comedy that entails. It is the story of how an idea—that a single man should lead Christ's Church on Earth—has endured for two millennia, shaping the world in ways its earliest adherents could never have imagined.

The entire edifice of the Papacy rests on a single, momentous question: what was so special about the Bishop of Rome? How did the leader of the Christian community in one city, however important, come to be recognized as the leader of a global faith? The answer, woven through two millennia of theology, politics, and culture, begins not in a Roman palace but on a dusty road in the Roman province of Judea, with a fisherman named Simon. This fisherman, impulsive and often flawed, would become the central figure in the argument for Roman primacy, the rock upon which, in the Catholic tradition, the Church itself is built.

The foundational claims for papal authority are rooted in a handful of key passages from the New Testament Gospels. The most significant, the veritable cornerstone of the Petrine doctrine, is found in the Gospel of Matthew. In the vicinity of Caesarea Philippi, Jesus asks his disciples who they believe him to be. It is Simon who answers, with a flash of insight he believes comes directly from God: “You are the Messiah, the Son of the living God”. Jesus’s response to this confession is what sets the stage for everything to come. "Blessed are you, Simon son of Jonah," he declares, "And I tell you that you are Peter, and on this rock I will build my church, and the gates of Hades will not overcome it. I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven" (Matthew 16:17-19).

The significance of this moment can hardly be overstated. Jesus gives Simon a new name, Petros in Greek, which translates to "rock". He then appears to make a play on words, declaring that on this petra (a large rock or bedrock) he will build his church. The bestowal of the "keys of the kingdom" and the power to "bind and loose"—rabbinic terms for forbidding and permitting or pronouncing judgment—further underscored this unique grant of authority. While Protestants and Orthodox Christians have often interpreted "the rock" to be Peter's confession of faith or Christ himself, the Roman Catholic understanding has remained firm: Jesus was investing Peter, the man, with a special role of leadership and authority over the fledgling community of believers.

Other passages reinforce this theme of Peter’s preeminence. In the Gospel of Luke, during the Last Supper, Jesus tells Peter, “Simon, Simon, Satan has asked to sift all of you as wheat, but I have prayed for you, Simon, that your faith may not fail. And when you have turned back, strengthen your brothers” (Luke 22:31-32). Here again, Peter is singled out, given a mission to be a source of strength for the other apostles after his own predicted failure and repentance. Finally, in the Gospel of John, a post-resurrection appearance of Jesus on the shore of the Sea of Galilee features a poignant exchange. Three times, Jesus asks Peter, "Do you love me?" and three times, Peter affirms his love. Each time, Jesus responds with a command: "Feed my lambs," "Tend my sheep," "Feed my sheep" (John 21:15-17). This dialogue is seen as a formal commission, entrusting the entire flock of Christ to Peter’s care.

These scriptural passages established Peter as a leader, the "prince of the apostles." But for this to become the basis of the Papacy, a second, crucial historical claim had to be established: that Peter traveled to Rome, led the church there, and died there as a martyr. Curiously, the New Testament itself is silent on this point. The Acts of the Apostles, which chronicles the early spread of Christianity, follows Peter’s ministry in Jerusalem and Judea before shifting its focus almost entirely to the Apostle Paul. After his miraculous escape from prison in Jerusalem, Peter "departed and went to another place" (Acts 12:17), and the text gives no further details of his whereabouts. Paul’s extensive letter to the church in Rome, written around 57 AD, contains a long list of personal greetings but makes no mention of Peter, a seemingly odd omission if Peter were already the established leader of that community.

Despite the silence of the scriptures, a powerful and consistent tradition emerged within a generation of the apostles' deaths that Peter did, in fact, end his life in Rome. The earliest written evidence comes from a letter sent by the church of Rome to the church of Corinth around 96 AD. This document, known as the First Letter of Clement, was written to address a dispute that had erupted in the Corinthian community, where some leaders had been deposed. In urging a return to order, the author, traditionally identified as Pope Clement I, points to the recent heroic examples of the apostles. He writes, "Peter, through unrighteous envy, endured not one or two, but numerous labours; and when he had at length suffered martyrdom, departed to the place of glory due to him." He immediately follows this by mentioning Paul’s martyrdom, linking them as the two great pillars of the Roman church. While the letter doesn't explicitly state where Peter was martyred, the context—a letter from Rome holding up these figures as "noble examples of our own generation"—makes Rome the overwhelmingly likely location.

This tradition grew stronger and more explicit in the writings of the second century. Around 110 AD, Ignatius, the bishop of Antioch, wrote a letter to the Roman church while on his way to his own martyrdom there. In it, he says, "I do not, as Peter and Paul, issue commandments unto you." This implies that the Roman Christians were accustomed to receiving commandments from Peter and Paul, suggesting a special authority associated with them in that city. A few decades later, around 180 AD, a bishop from Gaul named Irenaeus of Lyon wrote a massive work titled Against Heresies. For Irenaeus, the key to refuting heretical groups like the Gnostics, who claimed to possess secret knowledge passed down from Jesus, was to point to the public, verifiable teaching of the apostles handed down through an unbroken line of bishops in the major churches.

In a pivotal passage, Irenaeus argues that since it would be too tedious to list the succession of bishops in every church, he will focus on "that very great, the very ancient, and universally known Church founded and organized at Rome by the two most glorious apostles, Peter and Paul." He then provides a list of the Roman bishops, starting with Linus, who he says was appointed by the apostles after their founding of the church, followed by Anacletus, and then Clement, the author of the letter to Corinth. Irenaeus's testimony is immensely important. Writing from a distant province, he affirms as a matter of common knowledge that Peter and Paul founded the Roman church and that there is an unbroken chain of succession from them. By the end of the second century, other writers like Tertullian in North Africa were also speaking plainly of Peter’s martyrdom in Rome, specifically mentioning that he suffered a death like his Lord's (i.e., crucifixion) under the Emperor Nero.

For centuries, this powerful literary tradition was the primary evidence for Peter’s presence in Rome. But in the 20th century, a new and dramatic chapter was added. In 1939, workmen preparing a tomb for Pope Pius XI in the grottoes beneath St. Peter's Basilica broke through a floor and discovered a void. This accidental discovery led Pope Pius XII to authorize a secret and systematic archaeological excavation of the area directly under the main altar. Over the next decade, the excavators uncovered an astonishing sight: a vast Roman necropolis, a "city of the dead," filled with pagan mausoleums from the second and third centuries.

The existence of this cemetery directly beneath the heart of Christendom was startling. It proved that the site of the basilica had not been a sacred space in pagan Rome but a common burial ground on the slopes of the Vatican Hill. At the center of this necropolis, directly below the papal altar, the archaeologists found a simple monument dating to around 160 AD. This structure, known as the Aedicula, consisted of a niche set into a wall, which came to be known as the "Red Wall," flanked by two columns. Next to it was another wall, the "Graffiti Wall," covered in early Christian prayers and invocations scratched into the plaster, many of which called upon Peter. The Aedicula itself was located in front of an earlier, humble grave in the earth.

The location and antiquity of this shrine strongly suggested that it was the "trophy" of Peter mentioned by a Roman priest named Gaius around the year 200. While the excavations could not definitively prove that the original grave held the remains of the apostle, the evidence was compelling. This was a spot revered by Christians as Peter's burial place from at least the mid-second century. Subsequent investigations found a niche in the Graffiti Wall containing the bones of a robust man aged between 60 and 70, consistent with the traditional account of Peter's age at martyrdom. An Italian archaeologist, Margherita Guarducci, even deciphered a faint Greek inscription near the niche that she read as Petros eni—"Peter is here." In 1968, Pope Paul VI announced that the relics of St. Peter had been identified in a manner considered convincing. While scholarly debate continues, the archaeology under St. Peter's provides powerful corroboration for the ancient literary tradition of Peter's Roman martyrdom.

The dual claims—that Christ gave Peter a unique authority and that Peter exercised this authority as the head of the Roman church—were the twin pillars upon which the ideology of the Papacy was built. The concept that held them together was that of "apostolic succession." The idea, articulated so clearly by Irenaeus, was that the authority and teaching of the apostles were not a free-for-all but were passed down in an orderly and public manner to their appointed successors, the bishops. As the church grew and faced challenges from competing interpretations of Christianity, this principle of an unbroken chain of command back to the apostles became a vital tool for maintaining unity and defining orthodox belief.

In this framework, the successor of Peter naturally held a special place. If Peter was the chief of the apostles, then his successor should be the chief of the bishops. Rome’s claim was further bolstered by what was often called its "double apostolicity"—it was the see not just of Peter, but of Paul as well. The two greatest figures of the early Church had both consecrated the Roman community with their preaching and sealed it with their blood. No other church in the world could make such a claim. This, combined with Rome’s natural prestige as the capital of the Empire, gave the pronouncements of its bishop a unique weight.

The very earliest exercise of this special authority can be seen in the aforementioned Letter of Clement to the Corinthians. Around 96 AD, the church of Rome, led by its bishop Clement, took it upon itself to intervene in an internal dispute in another church hundreds of miles away in Greece. The letter is written in a tone of firm but fraternal admonition, urging the Corinthians to cease their sedition and restore their deposed elders. What is remarkable is that there is no indication the Corinthians had asked for this intervention. The Roman church acted on its own initiative, believing it had a responsibility to ensure peace and order in a sister community. This was not a command from a sovereign but an early, subtle assertion of a broader concern and a right to be heard.

A more forceful and controversial assertion of Roman authority came a century later, during the pontificate of Victor I (189-199). The issue at hand seems trivial today, but it was of great importance to the early Christians: the correct date for celebrating Easter. Most churches, including Rome, celebrated it on the Sunday following the Jewish Passover. The churches in the province of Asia Minor, however, followed a tradition they claimed came from the Apostle John, celebrating it on the 14th day of the Jewish month of Nisan, regardless of the day of the week. Adherents of this practice were known as Quartodecimans (from the Latin for "fourteenth").

Victor, a man described as having an "ardent zeal," was determined to impose uniformity. He called for synods to be held throughout the Christian world to address the issue. When Polycrates, the bishop of Ephesus and spokesman for the Asian churches, wrote to Victor politely but firmly refusing to abandon their ancient custom, Victor took a drastic and unprecedented step: he attempted to excommunicate all the Quartodeciman churches, declaring them outside the universal communion. This move shocked many other bishops, even those who agreed with Victor on the dating of Easter. Irenaeus of Lyon, the same man who had extolled the Roman church’s apostolic lineage, wrote to Victor urging moderation. He argued that previous Roman bishops, while disagreeing with the Asian practice, had maintained fellowship with them, and that diversity in custom could actually be a sign of unity in faith. Victor's threatened excommunication does not appear to have been universally accepted, but the incident was a watershed moment. For the first time, a Bishop of Rome had claimed the authority to cut off an entire group of churches from the body of the faithful over a disciplinary matter.

The third century saw the theological underpinnings of this authority become more explicit. A major controversy arose over the question of whether Christians who had been baptized by heretics or schismatics needed to be re-baptized if they sought to enter the Catholic Church. Cyprian, the influential bishop of Carthage in North Africa, held that any baptism outside the one true Church was invalid. In Rome, however, Pope Stephen I (254-257) upheld the traditional Roman practice: as long as the baptism was performed with the correct intention and formula (in the name of the Father, Son, and Holy Spirit), it was valid and should not be repeated.

The dispute became heated. Cyprian, while holding a high view of Peter’s role as a symbol of the Church's unity, believed that all bishops shared equally in the apostolic commission. He convened councils of North African bishops who supported his position. Stephen, in response, became the first pope known to have explicitly and forcefully invoked the Matthew 16 text—the "You are Peter" passage—as the basis for his authority. He argued that as the successor of Peter, seated on the cathedra Petri (the chair of Peter), he had the right and duty to settle the matter for the entire Church. He threatened to break communion with the North African and Eastern bishops who supported re-baptism. The crisis was only averted by the outbreak of a new persecution under the Emperor Valerian, in which both Stephen and, a year later, Cyprian would be martyred. Though the immediate conflict was unresolved, Stephen's argument had set a crucial precedent. The scriptural claim of Petrine primacy was now directly linked to the office of the Bishop of Rome to justify a claim to universal jurisdiction.

By the dawn of the fourth century, on the eve of the conversion of Emperor Constantine, the foundations of papal authority were firmly in place. The Bishop of Rome was the head of a large and wealthy Christian community in the capital of the empire. His church was venerated for its connection to the two greatest apostles, Peter and Paul, and was widely seen as a steadfast guardian of the orthodox faith. Its leaders had, on several occasions, asserted a right to guide, and even discipline, other churches. While this claim to universal authority was by no means universally accepted—as the resistance from figures like Irenaeus and Cyprian shows—the theoretical basis had been clearly articulated. The See of Rome was now widely recognized as the See of Peter. The stage was set for a dramatic transformation, one that would see the leader of a once-persecuted sect rise to a position of unparalleled influence in a newly Christian empire.