Pope Boniface VIII (1294-1303)

The Doctrinal Apex of the Medieval Papacy

The first reason to remember his name lies in Unam sanctam. With this bull of 18 November 1302, Boniface VIII formulated the most absolute version ever stated of papal primacy: drawing on the medieval theory of the two swords, he affirmed that the two powers—spiritual and temporal—are in the hand of the Church, with the temporal power to be exercised “for the Church” and subordinated to the spiritual.^[9][10] The final sentence, where the pope “declares, says, defines, and pronounces” submission to the Roman Pontiff as necessary for salvation, remains one of the most solemn definitions of the entire medieval magisterium.

This doctrine is not an obsolete curiosity. While the medieval political trappings—the claim to direct control over temporal crowns—have been abandoned, the dogmatic core of Unam sanctam—the primacy of the Roman Pontiff as a doctrine of faith, distinct from the political application the Middle Ages drew from it—has been renewed and approved by the Church: belonging to the one Church of Christ and recognizing the authority of its visible head touches on the question of salvation.

The Direct Clash with the Emerging Modern State

The second reason is political and historical. Boniface VIII’s pontificate marks the breaking point between the universal papacy of the 13th century and the national monarchies in the process of consolidation, foremost among them the France of Philip the Fair.^[11][12] Where Gregory VII and Innocent III had bent emperors to their will, Boniface VIII faced a lawyer-king surrounded by legal experts who turned the weapons of law, public opinion, and force against him.

The outcome—the humiliation at Anagni, then the papacy’s move to Avignon under French tutelage—makes this pontificate the threshold of a new era. Understanding Boniface VIII is to understand how Europe transitioned from the pontifical Christendom to the sovereign state.

A Tarnished Memory That Must Be Restored

The third reason is that of historical justice. Few popes have been so slandered. Defeated by an adversary who survived him, Boniface VIII was subjected to a propaganda machine of formidable effectiveness: posthumous trial for heresy, accusations of unbelief and infamous morals, Dante’s Inferno.^[13][14] Yet the investigation conducted at the Council of Vienne resulted in no condemnation; cardinals testified to his orthodoxy, and no champion appeared to defend the accusations by force.

Reading Boniface VIII as a Catholic is neither to canonize a man whose governance faults were real—nepotism, harshness, pride—nor to endorse the black legend forged by his enemies. It is to hold both ends: a fallible pope in his methods, but legitimate in his office and faithful in the doctrine he defended.

A Birth in Anagni in the Caetani Family

Benedetto Caetani was born in Anagni, in Lazio—the same town that had produced several popes before him—into a noble family of the region.^[15][16] The year of his birth is disputed: Wikipedia gives “between 1217 and 1230”^[17], while the Catholic Encyclopedia places it “around 1235”^[18], with the range 1230–1235 most commonly accepted. Through his mother, he was related to the house of Segni, which had given the Church three great popes: Innocent III, Gregory IX, and Alexander IV.^[19]

Honesty requires presenting these early details as approximate: for a younger son of the 13th-century nobility, archives are scarce, and the later glory—and infamy—of the pope inspired sometimes biased accounts.

The Formation of a Leading Jurist

The young Caetani received an exceptional legal education. He studied at Todi and Spoleto, then earned a doctorate in canon and civil law, the dual expertise that made the great statesmen of the Church at that time.^[20][21] A canon in several places—Anagni, Todi, Paris, Lyon, Rome—he accumulated a canonical culture that would make him, once pope, the legislator of the Liber Sextus.

This profile as a jurist is the key to his entire pontificate. Where Celestine V was a saint without legal knowledge, Caetani was his exact opposite: a man of law, brilliant, tough, confident in his reasoning—and convinced that law could settle everything, including the relationship between pope and kings.

The Diplomat and Curial Cardinal

From 1265, Caetani entered papal diplomacy. He accompanied Cardinal Ottobuono Fieschi—the future Pope Adrian V—to England to resolve the conflict between the king and his barons.^[22] Around 1276, he joined the Roman Curia as consistorial advocate and notary, at the heart of the Church’s administrative machinery.

His career culminated in the cardinalate: created cardinal-deacon in 1281 by Martin IV, then cardinal-priest in 1291, he was sent as legate to France and Sicily.^[23][24] At the time of the strange pontificate of Celestine V, Benedetto Caetani was thus one of the most experienced men of the Sacred College—and one of the most ambitious.

The Canonist of the Renunciation

Caetani’s role in Celestine V’s renunciation is one of the most discussed episodes in pontifical history. When the holy hermit, overwhelmed by the burden, wished to abdicate in December 1294, it was notably the reputed canonist Cardinal Caetani whom he consulted on the lawfulness of such an act—a question that canon law had never settled.^[25][26] Caetani confirmed that a pope could freely renounce.

History has often suspected the cardinal of having encouraged the old man to step down in order to succeed him. Legend, reported by hostile chroniclers, even claims he had nocturnal voices whispered in the pope’s chamber urging him to abdicate. The fact is unverifiable, but it reveals the mistrust that Caetani’s election aroused from the start.

The Election of December 24, 1294

Eleven days after Celestine V’s renunciation, on December 24, 1294, the cardinals gathered at the Castel Nuovo in Naples elected Benedetto Caetani, who took the name Boniface VIII.^[27][28] The choice of a seasoned jurist, after the unhappy experience of an ungovernable saint, expressed a clear will: to take back control of a Church delivered to disorder.

The contrast between the two men was total. The illiterate hermit was succeeded by the doctor of law; the pope of Naples under Angevin tutelage was succeeded by a pontiff determined to restore the authority of Rome. Boniface VIII was crowned with great pomp at Saint Peter’s in Rome on January 23, 1295, “with unparalleled splendor and magnificence.”^[29]

The Tragic Fate of Peter of Morrone

One formidable problem remained: what to do with the former pope? Venerated as a saint, Peter of Morrone could become, in the hands of Boniface’s enemies—the Colonna family, King Philip IV of France—an antipope or a rallying point for schism.^[30][31]

Boniface VIII therefore chose to place him under guard. Captured while attempting to flee by sea, the hermit was imprisoned at the castle of Fumone, in Lazio, where he died on May 19, 1296. His supporters accused Boniface of mistreatment or even murder; but no serious evidence supports these accusations, and modern examination of Saint Celestine’s skull has ruled out murder.^[32] Nevertheless, the affair weighed heavily on the new pope’s reputation.

The Liber Sextus, a Monument of Canon Law

True to his vocation as a jurist, Boniface VIII endowed the Church with a legislative monument. In 1298, by the bull Sacrosanctae Romanae Ecclesiae, he promulgated the Liber Sextus (the "Sixth Book"), a vast official collection of decretals complementing the five books of the Decretals of Gregory IX.^[33][34] The work gathered pontifical and conciliar constitutions issued thereafter, arranged with remarkable legal rigor, and remained for centuries one of the foundations of Church law.

It is in this Liber Sextus that the decretal appears by which Boniface VIII permanently established the lawfulness of papal resignation—the very act inaugurated by Celestine V, and which Benedict XVI would invoke in 2013.

The Jubilee of 1300: The First Holy Year

The most enduring and happiest act of his pontificate was the institution of the first Jubilee in the history of the Church. By the bull Antiquorum habet fida relatio of 22 February 1300, Boniface VIII granted a plenary indulgence to any pilgrim who, contrite and confessed, visited the basilicas of Saint Peter and Saint Paul in Rome during the Holy Year.^[35][36]

The success was immense. The Florentine chronicler Giovanni Villani, an eyewitness, reported that about two hundred thousand pilgrims were constantly in Rome, and that up to thirty thousand people were counted in a single day.^[37] Boniface and his aides managed the influx "with order, provisions were abundant and sold at moderate prices." This first Jubilee inaugurated a living tradition: the Church still celebrates its Holy Years today, direct heirs of the 1300 initiative.

The University Founder and Patron of the Arts

Boniface VIII was also an intellectual builder. In 1303, by the bull In supremae praeminentia dignitatis, he founded the Studium Urbis—the University of Rome, ancestor of the current Sapienza—and in the same year created the University of Fermo.^[38][39] He revived the Vatican Library, which by 1311 held several dozen Greek manuscripts, and was a patron of the arts, commissioning Giotto and other masters at the dawn of the Renaissance.

"Boniface VIII was a protector of the arts and letters; he founded the University of Rome, restored the Vatican Library, and called to his side the greatest artists of his time." — synthesis of encyclopedic entries on the pontificate^[40]

He is also credited with the elevation, in 1298, of the feasts of the four Doctors of the Western Church—Ambrose, Augustine, Jerome, Gregory the Great—to the rank of double feasts.^[41] This image of scholar and builder is too often overshadowed by the clamor of his conflicts.

A Rivalry of Roman Families

Even before the confrontation with France, Boniface VIII had to face an internal war: the conflict with the powerful Colonna family, rivals of the Caetani in the Lazio region.^[42][43] Two Cardinal Colonnas, Jacopo (Giacomo) and Pietro, contested the legitimacy of Boniface’s election—arguing that Celestine V’s resignation was invalid—and maintained ties with the pope’s enemies.

The dispute escalated into open confrontation when, in 1297, a member of the Colonna family intercepted a convoy carrying the papal treasury.

Excommunication and the Destruction of Palestrina

Boniface VIII’s response was swift and severe. By the bulls of 10 and 23 May 1297, he deposed and excommunicated the two Cardinal Colonnas, confiscated their goods, and even preached a crusade against the family.^[44][45] After a siege, the fortress city of Palestrina—the Colonna stronghold—surrendered in September 1298 and was razed, its ground symbolically plowed and salted according to ancient tradition.

This unyielding harshness toward a great Roman family made Boniface VIII irreconcilable enemies. The Colonna, dispossessed and exiled, took refuge in France, where they channeled their thirst for vengeance in the service of Philip IV. It was a Colonna—Sciarra—who, six years later, would raise his hand against the pope at Anagni.

Clericis laicos: Taxation of the Clergy (1296)

The great duel began over a question of money. To finance their wars, the King of France Philip the Fair and King Edward I of England levied taxes on the clergy without authorization from Rome. Boniface VIII responded with the bull Clericis laicos, dated 25 February 1296, which forbade under penalty of excommunication any taxation of the clergy by secular power without the consent of the Holy See.^[46][47]

“Antiquity teaches us that laymen are very hostile to clerics.” — Boniface VIII, bull Clericis laicos, 25 February 1296^[48]

Philip the Fair replied with the efficiency of a modern statesman: he prohibited the export outside the kingdom of gold, silver, and precious objects, cutting off at a stroke the revenues the papacy drew from France. Boniface had to retreat for the first time and temper his bull. The balance of power had shifted.

The Bernard Saisset Affair (1301)

The truce was short-lived. In 1301, the king had the Bishop of Pamiers, Bernard Saisset, arrested, tried, and condemned by his court, accused of treason and inciting revolt.^[49][50] For Boniface VIII, this was an intolerable violation of ecclesiastical immunity: a secular king could not judge a bishop without the pope.

This affront triggered the second phase, the most dramatic, of the conflict. Boniface summoned the bishops of France to a council in Rome and sent the king a solemn bull of remonstrance.

Ausculta fili: “Listen, my son” (1301)

By the bull Ausculta fili (“Listen, my son”), dated 5 December 1301, Boniface VIII reminded Philip the Fair that the pope is, over all the kings of the earth, the spiritual monarch established by God, “the keeper of the keys, the judge of the living and the dead.”^[51][52]

“Listen, my son, to the precepts of your father. […] Let no one persuade you that you have no superior and that you are not subject to the supreme head of the ecclesiastical hierarchy.” — Boniface VIII, bull Ausculta fili, 5 December 1301^[53]

The king’s response was a masterstroke of propaganda. His legal experts circulated a forged and caricatured version of the bull (Deum time), making it appear that the pope claimed to subject the king to temporal power — which Boniface had not written — in order to turn public opinion and the estates of the realm against Rome.^[54]

Unam sanctam: The Supreme Definition (18 November 1302)

It was in this climate of rupture that Boniface VIII promulgated, on 18 November 1302, the bull Unam sanctam — the most famous and most commented text of his entire pontificate.^[55][56] Taking up the theory of the two swords, based on the Gospel episode where the Apostles present two swords (“Lord, here are two swords,” Lk 22:38), he taught that the two powers — the spiritual sword and the temporal sword — belong to the Church: the spiritual wielded by the Church, the temporal wielded for the Church and subject to the spiritual.

The bull culminates in a definition of unprecedented solemnity, where the pope uses the very verbs of dogmatic definitions:

“Furthermore, we declare, say, define, and pronounce that it is absolutely necessary for salvation, for every human creature, to be subject to the Roman Pontiff.” — Boniface VIII, bull Unam sanctam, 18 November 1302^[57]

The original Latin text — “Porro subesse Romano Pontifici omni humanae creaturae declaramus, dicimus, definimus et pronuntiamus omnino esse de necessitate salutis” — is today among the major texts of the Denzinger, the reference collection of Church definitions.^[58]

Distinguishing the Dogmatic Core from the Political Wrapping

Unam sanctam is often misread, as if it claimed for the pope a direct political power over all kingdoms. A careful Catholic reading distinguishes two layers. The first is the medieval hierocratic wrapping: the idea that the pope can, in practice, dispose of temporal crowns. This claim, linked to the context of the conflict with Philip IV of France, does not bind the faith and has been abandoned by the Church.

The second layer is the dogmatic core: submission to the Roman pontiff is necessary for salvation. Properly understood, this statement does not say that all civil power depends on the pope, but that the one Church willed by Christ has a visible head, and that voluntarily separating from this communion endangers salvation. This is a truth of ecclesiology, not politics.

Later Magisterial Reception

That this core is doctrinally received, and not repudiated as an excess of Boniface VIII, is attested by a decisive fact: the Fifth Lateran Council, in its session XI (19 December 1516), under Pope Leo X, renewed and approved the constitution Unam sanctam.^[59]

“Since subjection to the Roman pontiff is necessary for salvation for all Christ’s faithful, as the testimony of Holy Scripture and of the holy Fathers teaches, and as the constitution of Pope Boniface VIII, our predecessor, which begins Unam sanctam, declares, we therefore renew that constitution and give it our approval, with the approval of this present holy council—without prejudice to the declaration of Pope Clement V, which begins Meruit.”_ — Fifth Lateran Council, session XI, 19 December 1516, constitution Pastor aeternus of Leo X (translation from the text of the acts; reference English text in note)^[60]

An ecumenical council does not reprise the formula of a bull it would consider heretical. The best proof that Boniface VIII defined nothing false is that the Church embraced, two centuries later, the substance of his definition. The controversy therefore did not concern the truth of the dogma, but its application to the power of kings—a field where Boniface, a man of the Middle Ages, defended a thesis that history has surpassed without affecting the faith.

The Plan to Depose the Pope

The conflict reached its climax in 1303. Advised by his new chancellor William of Nogaret, Philip IV of France resolved to go on the offensive: he convened an assembly that accused Boniface VIII of heresy, simony, and various crimes, and demanded the convocation of a general council to try and depose the pope.^[61][62]

On his side, Boniface VIII was preparing a bull that would have excommunicated the king of France and released his subjects from their oath of loyalty. To prevent this excommunication, Nogaret was sent to Italy to seize the person of the pope.

The “Slap of Anagni” (September 7–9, 1303)

On the night of September 7 to 8, 1303, a force of about two thousand men, led by Nogaret and Sciarra Colonna, burst into Anagni, the pope’s hometown where he was staying, and stormed the papal palace.^[63][64] Abandoned by his own, Boniface VIII is said to have donned his pontifical robes and seated himself on his throne, cross in hand, to face his attackers. An ancient tradition credits him on this occasion with the resolve to die pope rather than yield; but no identified contemporary source reports any words to that effect—the Cronica of Dino Compagni, to whom they are sometimes attributed, does not contain the account of Anagni.^[65]

Tradition holds that Sciarra Colonna, drunk with hatred, wanted to kill the pope or struck him—perhaps with his iron gauntlet—a gesture remembered in Italian memory as the schiaffo di Anagni, the “slap of Anagni.”^[66] The elderly pope, prisoner in his own looted palace, held out for three days without yielding or abdicating.

Liberation and Death in Rome

On September 9, 1303, the inhabitants of Anagni rose up: seized by remorse and anger at the outrage done to their bishop and fellow citizen, they drove out Sciarra Colonna and the king’s men, and freed the pontiff.^[67][68] Escorted by the Orsini cardinals, Boniface VIII returned to Rome.

But the shock had been fatal. Physically and morally broken, the pope died at the Vatican on October 11, 1303, “of a violent fever, fully conscious and in the presence of eight cardinals,” after receiving the sacraments.^[69][70] He was buried in a marble sarcophagus in the Vatican grottoes. His successor, Benedict XI, elected at the end of October 1303, would reign only eight months; two years later, the papacy would leave Rome for Avignon.

Philip IV’s Relentlessness

Philip IV’s hatred did not end with the death of his adversary. To retroactively justify the attack at Anagni and consolidate his dominance over the Church of France, the king demanded a posthumous trial against the memory of Boniface VIII.^[71][72] Pope Clement V, a Frenchman installed in Avignon and under the king’s pressure, agreed to open the investigation — the mandate was signed on October 18, 1309.

The accusations were monstrous: heresy, unbelief, simony, and even moral crimes. The real objective was not truth, but political terror: condemning a dead pope was a way to subjugate the living papacy.

The Dismissal at the Council of Vienne (1311)

The trial bogged down and was then emptied of its substance. At the Council of Vienne, opened on October 16, 1311, the case was closed without condemnation.^[73][74] Three cardinals solemnly testified to Boniface VIII’s orthodoxy and morality; two Catalan knights even offered to defend his innocence by arms, and no one accepted the challenge.

By refusing to condemn Boniface VIII, the Church preserved the honor of the papacy — but at the cost of heavy concessions to Philip IV in other areas, notably the suppression of the Knights Templar at the same council.

📖 See the detailed article: The Crisis of the Templars

Separating Truth from Falsehood

What should be retained from these accusations? Serious historiography has long debunked the black legend: the charges of heresy and unbelief were political slander, and there is “no substantial evidence” of the alleged moral crimes.^[75] What remains are real faults of governance, which fidelity to the truth requires acknowledging: marked nepotism favoring the Caetani family, excessive harshness toward the Colonna, pride and political clumsiness that precipitated the disaster.

The accurate portrait is therefore neither that of a saint nor the monster painted by his enemies: a great canon lawyer pope, with legitimate authority and sound doctrine, but whose temperament and methods harmed the Church he sought to serve.

The “Prince of the New Pharisees”

No pen has done more harm to the memory of Boniface VIII than that of Dante Alighieri. A political opponent of the pope — a supporter in Florence of the faction opposed to papal interference — Dante pursued Boniface VIII with implacable literary hatred in the Divine Comedy.^[76][77] In the Inferno, the pope is called “the prince of the new Pharisees.”

“The prince of the new Pharisees, with war close to Lateran…” — Dante, The Divine Comedy, Inferno, Canto XXVII^[78]

Most notably, Dante anticipates placing Boniface VIII in the eighth circle, among the simoniacs (traffickers of sacred goods): in Canto XIX, the already damned Pope Nicholas III mistakes Dante for Boniface, whom he awaits head down in the rock.^[79] The poet vents all his rancor against a pontiff he judges greedy for temporal power.

A Poet’s Judgment, Not the Church’s

It must be said clearly: Boniface VIII’s place in hell is a literary and political fiction, not a judgment of the Church. Dante was a committed partisan, settling earthly scores in his verses; he even composed his treatise Monarchia precisely to refute the theses of Unam sanctam on spiritual supremacy.^[80]

The Church, for its part, has never condemned Boniface VIII — on the contrary, it dismissed the accusations at Vienne and reaffirmed his doctrine at Lateran. Dante’s genius imposed an image for centuries; historical and theological truth corrects it. Confusing the verdict of a 14th-century Florentine poet with the judgment of the Church is a methodological error — the same one that mistakes the black legend for history.

Boniface VIII is the pope of paradox. A brilliant canon lawyer, he provided the Church with a code (Liber Sextus), inaugurated a living tradition (the Jubilee), founded a university, and protected the arts. As a theologian of pontifical authority, he elevated the doctrine of primacy to its medieval peak with Unam sanctam, whose doctrinal core remains fully Catholic and was renewed and approved by the Lateran Council.

But the man also embodied the limits of medieval theocracy. By attempting to treat the King of France as a vassal, he confronted a new force—the sovereign state—that no papal bull could contain. The humiliation at Anagni and the exile to Avignon arose from this error of the age, as much as from the violence of his adversaries.

The lesson, from a Catholic perspective, is twofold. On one hand, the legitimacy of a pope and the truth of a doctrine do not depend on political success or reputation: Boniface VIII, defeated and slandered, nonetheless defended a part of the truth that the Church has embraced. On the other hand, the spiritual mission of the papacy is not to be confused with temporal power: it is by renouncing the desire to govern kings that the Church paradoxically regained the properly spiritual authority that is hers. “My kingdom is not of this world” (Jn 18:36): the tragedy of Boniface VIII is, conversely, its striking confirmation.

The reliable core of this history is firmly established: Benedetto Caetani, canonist and cardinal, was elected pope on 24 December 1294 after Celestine V’s resignation; he promulgated the Liber Sextus (1298), instituted the first Jubilee (1300), founded the University of Rome, and confronted Philip IV of France head-on with the bulls Clericis laicos (1296), Ausculta fili (1301), and Unam sanctam (1302); he was the victim of the Anagni attack in September 1303 and died in Rome on 11 October 1303; the posthumous trial ordered by the King of France ended without condemnation at the Council of Vienne. These facts are attested by major reference works—Catholic Encyclopedia, Encyclopædia Britannica, Larousse—and by medieval chroniclers.^{[81][82][83][84]}

Several points remain debated, especially the birth date and details of the attack. The table below summarizes the main divergences among sources.

The documentation combines entries from major encyclopedias, the medieval chronicle of Giovanni Villani, modern studies on the Franco-papal conflict and the 1294 resignation, the texts of the bulls (in the Denzinger collection, Liber Sextus), and the later doctrinal rereading of Unam sanctam up to the Lateran Council.^[85][86][87]

• Pope Saint Celestine V (1294) — predecessor whose resignation, validated by the canonist Caetani, paved the way for Boniface VIII.
• The Avignon Papacy — the exile of the papacy on French soil, a direct consequence of Boniface VIII’s defeat by Philip IV of France.
• The Templar Crisis — the suppression of the Knights Templar, another concession extracted from Clement V by the King of France at the Council of Vienne.
• The Great Western Schism — the crisis following the Avignon captivity, a distant legacy of the papacy’s weakening after the death of Boniface VIII.
• Gallicanism — the doctrine of the autonomy of the Church of France from Rome, of which the Boniface–Philip IV conflict is one of the historical foundations.