Pope Gregory XVI (1765-1846)

The election of a monk to the Chair of Peter in 1831 was already a sign. For generations, the papacy had gone to prelates of diplomacy and the Curia. Cappellari, however, came from the cloister: he had spent his life in prayer, study, and governing an order, not in nunciatures. He was a man of doctrine raised to power in an Europe convulsed by revolution.^[9][10]

This origin explains the two faces of his reign. On one hand, an absolute doctrinal firmness: for Cappellari, the French Revolution, liberalism, and secret societies were not past accidents but a permanent offensive against the order willed by God. The Church must not negotiate with this spirit: it must condemn it. Mirari vos is the charter of this intransigence.^[11][12] On the other hand, a missionary passion inherited from his prefecture at Propaganda Fide: the pope who refused modern liberties in his States was the one who multiplied bishoprics in Asia, Africa, and the Americas, and who denounced the enslavement of Black people as “unworthy of the Christian name.”^[13][14]

“He strove to suppress the growing forces of liberalism and allied firmly with the conservative European monarchies led by Metternich.”
— From the Encyclopædia Britannica, article “Gregory XVI”^[15]

This makes him a pivotal and contested figure. His inner rigor was real: a poor, learned, selfless monk, he governed the universal Church with genuine spiritual elevation. But his distrust of liberal ideas, and even more the repression exercised in his States, fostered a liberal opposition in the Papal States that would erupt, two years after his death, in the revolution of 1848. The details of Catholic liberalism, slavery, or missions by continent belong to separate articles; what is unique to Gregory XVI is that he embodied the intransigent option of the Roman Restoration while expanding the Catholic horizon to the dimensions of the earth.

The article relies on several families of sources, cited in notes by their short reference:

A Monk from Murano

Bartolomeo Alberto Cappellari was born on 18 September 1765 in Belluno, then part of the Republic of Venice, into a family of the petty nobility of the robe: his father, Giovan Battista, was a notary, and his mother, Giulia Cesa, was the daughter of a notary.^[16][17] (The old Catholic Encyclopedia of 1913 gives 8 September; modern scholarly dictionaries retain the 18th.)^[18][19]

At eighteen, in 1783, he entered as a novice with the Camaldolese — the eremitic and Benedictine branch founded by Saint Romuald — at the monastery of San Michele di Murano, near Venice, taking the religious name Dom Mauro.^[20][21] Ordained priest in 1787, he immediately taught philosophy and theology there.^[22] In 1805, at forty, he was appointed abbot of the monastery of San Gregorio al Celio, on the Caelian Hill in Rome — the very monastery whose memory inspired, twenty-six years later, his choice of papal name.^[23][24]

Cappellari’s formation was not that of a diplomat but of a regular theologian: a life of prayer, patristic scholarship, and monastic governance. This background shaped his distinctive character — a confident doctrinal intellect, a visceral attachment to the authority of the Church, and a certain estrangement from the world of courts and chancelleries.

Il Trionfo della Santa Sede (1799): Infallibility before Vatican I

Cappellari’s masterwork as a theologian appeared in Rome in 1799: Il Trionfo della Santa Sede e della Chiesa contro gli assalti dei novatori — “The Triumph of the Holy See and the Church against the assaults of innovators, fought and repelled by their own weapons.”^[25][26] Conceived as early as 1789 and completed in 1796, the book is a polemic against Italian Jansenists and Gallican and conciliarist currents that sought to subordinate the pope to a council.^[27][28]

Its central thesis is key to understanding the man: the primacy of the pontiff is characterized by infallibility and therefore cannot be limited by any council.^[29] Cappellari thus defended, more than seventy years before the First Vatican Council (1870) would define it as dogma, the papal infallibility and the temporal sovereignty of the Holy See. The future pope was therefore, even before the Revolution, a convinced ultramontane: all for Rome, nothing against Rome.

“The primacy of the pontiff, characterized by infallibility, and therefore not limitable by any council.” — Summary of the thesis of Il Trionfo della Santa Sede, according to the Dizionario Biografico degli Italiani^[30]

Cardinal and Prefect of Propaganda Fide

Recalled to Rome after the Napoleonic turmoil to become Vicar General of the Camaldolese, Cappellari then rose through the ranks of the Curia.^[31] Pope Leo XII created him cardinal in pectore (secretly) on 21 March 1825, with the creation published on 13 March 1826; he received the title of San Callisto.^[32][33][34]

Above all, on 1 October 1826, he was appointed Prefect of the Congregation for the Propagation of the Faith (Propaganda Fide) — the Roman body directing all missionary activity of the Church, founded by Pope Gregory XV in 1622.^[35][36] For five years, Cappellari thus held in his hands the missions of the entire world: he knew their personnel, difficulties, and countries. This prefecture explains one of the two facets of his pontificate — the missionary pope was first and foremost the minister of missions.

Fifty Days, Eighty-Three Ballots

Pope Pius VIII died on 30 November 1830.^[37] The conclave that opened at the Quirinal on 14 December 1830 convened in a Europe aflame: the July Revolution of 1830 had overthrown Charles X in France, Belgium had risen up, and Poland was revolting against the Tsar. At the opening of the vacancy, the Sacred College numbered fifty-four living cardinals: forty-five of them took part in the conclave, nine remaining absent.^[38]

Divisions were sharp between the uncompromising zelanti — the intransigent party — and the moderates, while the powers exerted their influence: King Ferdinand VII of Spain exercised his veto (jus exclusivae) against Cardinal Giacomo Giustiniani.^[39] The conclave became deadlocked. Only after fifty days and eighty-three ballots did the electors turn, on 2 February 1831—the Feast of the Purification—to Cardinal Cappellari, Prefect of Propaganda, elected by thirty-one votes out of forty-five participants according to the Catholic Encyclopedia — the required two-thirds majority being thirty votes.^[40][41] (The figure of sixty-four days given in some older notices counts the vacancy of the See from the death of Pius VIII, 30 November 1830, not the conclave itself, which opened on 14 December: the two counts are compatible.)^[42] No conclave since has lasted so long.^[43] In memory of his Roman abbey of San Gregorio al Celio, the new pope took the name Gregory XVI.^[44]

The Last Pope Not Yet a Bishop, the Last Monk

Cappellari’s election marked a series of lasts that make him a milestone in papal history.

First, at the time of his election, he was not yet a bishop: a simple cardinal-priest and monk, he had to be consecrated bishop after his accession. He is the last pope in history elected before episcopal consecration.^[45][46]

Next, he is the last pope from a religious order between 1831 and 2013—a Camaldolese monk—until the election of the Jesuit Francis in 2013; since then, the Augustinian Robert Prevost, elected on 8 May 2025 under the name of Leo XIV, is the reigning pope.^[47][48]

Finally, he would be the last pope to govern the Papal States throughout his entire reign: his successor Pius IX would witness the collapse of the temporal power.^[49]

The 1831 Revolts and Austrian Intervention

Barely had Gregory XVI been elected when his States erupted. In the wake of the French July Revolution, secret societies stirred the Legations: as early as 4 February 1831, Bologna revolted and expelled the pro-legate; the tricolor flag was raised there on 8 February.^[50] Within fifteen days, Ferrara, Ravenna, Forlì, the Marches, and Umbria rejected papal sovereignty and planned to unite as the “United Italian Provinces.” The cardinal legate Benvenuti, sent to suppress the uprising, was taken prisoner.^[51]

The pope, lacking an army capable of maintaining order, called on Austria under Metternich. On 25 February 1831, an Austrian column marched on Bologna; within a month, the insurrection collapsed.^[52] For Metternich, these Italian revolts threatened the very survival of the conservative order in Europe; he had supported, at the conclave, the election of an absolutist pope determined to yield nothing to “the political madness of the century.”^[53] Thus, from the very first month of his reign, the Roman Church owed its temporal survival to the support of Austrian troops.

The Powers’ Memorandum (1831)

Foreign intervention came at a price: the great powers sought to impose reforms. On 21-22 May 1831, representatives of Austria, Russia, France, Prussia, and England, gathered in Rome, addressed a joint Memorandum to the pope demanding judicial reform, the introduction of laymen into administration, the election of municipal councils, and financial management entrusted to a largely lay body.^[54][55]

Gregory XVI accepted what he deemed practicable and implemented it through a series of edicts from July to November 1831 (judicial reform, administrative hierarchy). But he categorically refused two points: the principle of popular election of councils and the creation of a lay Council of State parallel to the Sacred College.^[56] On these two points, he never yielded: the government of the Papal States was to remain, in principle, ecclesiastical.

Ancona, Occupation, and Finances

The pacification was fragile. By December 1831, much of the States rose again; Austrian General Radetzky crushed the rebels near Cesena and retook Bologna at the end of January 1832.^[57][58] In 1832, to counterbalance the Austrian occupation of Bologna, France in turn seized Ancona—a coup that the Catholic Encyclopedia calls “a pure violation of international law.”^[59] French troops remained there until 1838: in total, the Papal States endured seven years under foreign military occupation.

This regime of repression and garrisons exhausted the Treasury. Military expenses, public works, and patronage deepened the debt; the pope’s sole journey through his provinces in 1841 cost two million francs.^[60][61] At Gregory XVI’s death in 1846, the burden of public debt and discontent were such that the States were already on the brink of the revolution that would drive Pius IX into exile in 1848.^[62]

The Brake on Railways: Fact and Legend

One image clings to Gregory XVI: that of the obscurantist pope who supposedly banned railways in his States, dubbing them chemins d’enfer (“roads to hell”), a pun on chemin de fer (“railway”). The phrase has stuck; yet it must be treated rigorously.

The fact is partly true: Britannica soberly notes that he “banned railways in his State.”^[63] But the quotation is apocryphal: no document or public statement by the pope attests that he ever uttered or wrote chemins d’enfer.^[64] The railway delay in the Papal States also had economic explanations: mountainous terrain making routes costly, the need to import iron and coal, and already strained finances.^[65] Serious historiography thus urges distinguishing the real brake on innovation, which is attested, from the legendary witticism attributed to the pope without proof. It is a good example of how an anticlerical caricature has frozen the image of a reign.

Lamennais, L'Avenir, and Catholic Liberalism

The most resounding doctrinal act of the pontificate arose from a conflict with a priest of genius. In October 1830, Abbé Félicité de Lamennais, along with Lacordaire and Montalembert, launched the newspaper L'Avenir in Paris, under the motto "God and Liberty." Fierce ultramontanes, they nonetheless called for the separation of Church and State, freedom of conscience, of the press, education, and association: they sought to reconcile the Church with modern liberties.^[66][67] When they came to Rome to plead their cause, they received only a frosty silence, followed by the papal response.

This response was the encyclical Mirari vos, published on August 15, 1832. It named neither Lamennais nor L'Avenir, but condemned each of their theses one by one.^[68] The details of condemned Catholic liberalism and the legacy of this quarrel—up to the Syllabus of Pius IX (1864)—are covered in separate articles; what belongs to Gregory XVI is the act of condemnation itself.

The “Delirium” of Freedom of Conscience

Mirari vos first attacks religious indifferentism—the idea that one could attain eternal salvation in any religion provided one lives morally.^[69] From this “very poisoned source,” the pope continues, springs the alleged freedom of conscience, which he calls an opinion “absurd and erroneous, or rather a delirium.”

“From this very poisoned source of indifferentism springs this absurd and erroneous opinion, or rather this delirium, that freedom of conscience must be assured and claimed for everyone.” — Gregory XVI, encyclical Mirari vos, August 15, 1832^[70]

He immediately condemns freedom of the press—this “detestable freedom, never sufficiently execrated, to publish any writings whatsoever”—and the separation of Church and State, which breaks “the mutual harmony between civil authority and the priesthood.”^[71] Finally, citing Saint Paul, he denounces rebellion against legitimate princes.

“There is no authority except from God, and those that exist have been established by God. Therefore, whoever resists authority resists the ordinance of God.” — Saint Paul, Epistle to the Romans 13, quoted by Mirari vos^[72]

To grasp the issue, one must avoid anachronism. Gregory XVI does not condemn religious freedom in the sense later understood by the Second Vatican Council in Dignitatis humanae: he condemns the philosophical indifferentism that denies that truth has rights which error does not. Catholic doctrine would more clearly distinguish, in the 20th century, between civil freedom in religious matters and doctrinal indifferentism—a distinction treated separately by Ignispedia. But the pope’s fundamental intention remains orthodox: to defend that not all religions are equal and that revealed truth obliges the conscience.

Singulari nos (1834) and the Break with Lamennais

Lamennais did not submit. In 1834, he published Paroles d'un croyant, an impassioned manifesto denouncing all authority, civil as well as ecclesiastical. Gregory XVI responded with the encyclical Singulari nos, dated June 25, 1834, which this time explicitly condemned the book.

“We condemn this book because it contains false, slanderous, and rash propositions that lead to anarchy, contrary to the word of God, impious, scandalous, and erroneous.” — Gregory XVI, encyclical Singulari nos, June 25, 1834^[73]

This was the definitive break: Lamennais left the priesthood and the Church, dying outside it in 1854. The tragedy of this brilliant priest, who had defended papal authority more vigorously than anyone before but ultimately broke upon it, would haunt French Catholicism for a long time.

If one act were needed to correct the image of a pope solely reactionary, it would be this one. On December 3, 1839, after consulting the College of Cardinals, Gregory XVI published the apostolic letter In supremo apostolatus, one of the strongest papal condemnations of the slave trade.^[74]

“Absolutely Unworthy of the Christian Name”

The pope denounces “the inhuman trade of Blacks and all other men,” declaring it “absolutely unworthy of the Christian name,” and he formally forbids any Christian from practicing or justifying it.

“We strictly prohibit and forbid any ecclesiastic or layperson to presume to defend as lawful this trade in Blacks, under whatever pretext or excuse.” — Gregory XVI, apostolic letter In supremo apostolatus, December 3, 1839^[75]

Gregory XVI places his action within a continuous pontifical tradition: he recalls the condemnations by Pius II (1462), Paul III (1537), Urban VIII (1639), Benedict XIV (1741), and Pius VII against the enslavement of peoples.^[76] Far from a 19th-century novelty, the Church’s opposition to the slave trade has its roots in the ancient Magisterium.

The Debated Scope: Trade or Possession?

The document has sparked a debate over its exact scope, which Ignispedia treats separately in the article Slavery of Blacks and the Catholic Church: did it target only the commerce of slaves or also their possession? In the United States, Bishop of Charleston John England gave it a restrictive reading—condemning the large-scale trade, not domestic slavery—an interpretation contested but which allowed part of the Southern Church not to oppose the institution outright.^[77] Nonetheless, the text remains a cornerstone of Catholic teaching against slavery.

The Heir of Propaganda

It is in the missionary field that Gregory XVI reveals his brightest aspect. A former Prefect of the Congregation for the Propagation of the Faith, he knew the mission apparatus better than any other pope of his century. Under his reign, the Catholic Church organized its expansion on a global scale.

The often-cited figures illustrate the effort, but they do not count the same thing: the standard syntheses credit Gregory XVI with more than seventy dioceses and apostolic vicariates erected — that figure counts territories — and one hundred ninety-five missionary bishops appointed — that figure counts persons, appointments accumulated over fifteen years of reign.^[78][79] The breakdown of foundations by type — twenty-seven dioceses and thirty-two apostolic vicariates — is given by McClintock and Strong’s Cyclopedia.^[80] Asia, Africa, and the Americas saw the establishment of structures that would carry the evangelization of the 19th century. Ignispedia details these undertakings in its articles on Catholic missions in Asia, in Africa, and in America.

Indigenous Clergy Against Colonial Patronage

Gregory XVI’s fundamental orientation is remarkable for its pastoral modernity. He promoted the formation of an indigenous clergy and hierarchy in mission countries, refusing that the Church in Asia or Africa remain eternally governed by Europeans.^[81] He also strove to place the missions under the direct control of the Holy See, opposing the Spanish and Portuguese patronage systems (patronato, padroado) that made them extensions of the colonial crowns.^[82][83] The pope known for political intransigence was, in this domain, a clear-sighted reformer: he wanted a missionary Church that was Roman and universal, not colonial.

On 26 May 1839, he solemnly canonized five saints — Saint Alphonsus Liguori, Saint Francis of Geronimo, Saint John Joseph of the Cross, Saint Pacificus of San Severino, and Saint Veronica Giuliani — and beatified thirty-three servants of God.^[84][85] To these five solemn canonizations are added four so-called equipollent canonizations — that is, without solemn ceremony, by extension to the universal Church of an already authorized local cult — (9 April 1832, 2 June 1834, 15 January 1841), making nine saints in total under his reign.^[86]

The Cologne Affair (1837)

Facing Protestant states, Gregory XVI knew how to be firm. In Prussian Rhineland, the issue of mixed marriages (between Catholics and Protestants) pitted Rome against the Berlin government: a papal brief forbade priests from blessing such unions without guarantees of the Catholic education of the children, where a secret arrangement between the state and local clergy had previously conceded.^[87]

The Archbishop of Cologne, Clemens August von Droste zu Vischering, chose to enforce the papal brief against the government agreement. On November 20, 1837, King Frederick William III had him arrested and imprisoned in the fortress of Minden — a show of force that provoked “general indignation throughout Europe.”^[88][89] On December 10, 1837, Gregory XVI, in a consistorial allocution, solemnly praised the archbishop’s firmness and protested against Prussia’s action.^[90] The affair was only resolved after the king’s death (1840). Rome had held firm: the freedom of the Church took precedence over political compromise.

Russia and Poland: Cum primum and the 1842 Protest

With Russia, the pope’s stance was more controversial. After the Polish uprising of November 1830 against the tsar, Gregory XVI issued, on June 9, 1832, the brief Cum primum to the bishops of Russian Poland, reminding them of their duty of obedience to legitimate authority and exhorting them to teach this submission to the faithful.^[91]

“Let every soul be subject to the higher authorities, for there is no authority except from God.” — Gregory XVI, brief Cum primum, June 9, 1832^[92]

This text, one of the most debated of his pontificate, was felt by Poles and European opinion — including Catholics — as a betrayal in favor of Tsar Nicholas I, who had promoted it.^[93] The pope, fundamentally opposed to revolution, believed the Church should not meddle in politics.

But the story did not end there. Faced with the persecution of Catholics and Uniates by Russia — mistreatment of nuns in Minsk, priests deported to Siberia, bishops imprisoned — Gregory XVI changed his tone. In an allocution of July 22, 1842 (Haerentem diu), he publicly denounced this oppression and denied ever intending to cover it with a veil of silence.^[94] In 1845, when receiving Nicholas I in Rome, he reproached him to his face for his tyranny and reminded him of the duties of his conscience. The tsar promised reforms; none followed.^[95][96] The complexity of this affair forbids a simple judgment: Gregory XVI was both excessively cautious and, ultimately, courageous.

Far from the image of a gloomy reign, Gregory XVI was a great patron of the arts and archaeology. He enriched the Vatican collections with two museums that bear his name.

The Gregorian Etruscan Museum (Museo Gregoriano Etrusco) was inaugurated on 2 February 1837—the anniversary of his election. It is one of the very first museums in the world expressly dedicated to Etruscan antiquities, sourced from excavations in southern Etruria, then part of the Papal States.^[97] Two years later, in 1839, he founded the Gregorian Egyptian Museum (Museo Gregoriano Egizio), devoted to antiquities of ancient Egypt.^[98] He also established the Gregorian Profane Museum for Greco-Roman sculptures. This austere monk was thus, paradoxically, one of the most active popes in heritage preservation and support for scholars.

An End in 1846

His reign ended with his life. Stricken with facial erysipelas, Gregory XVI felt his strength wane from 20 May 1846; he died in Rome on 1 June 1846, at the age of eighty.^[99][100] He had governed the Church for over fifteen years, in a Europe in full upheaval.

The Tomb in St. Peter’s

Buried in St. Peter’s Basilica, Gregory XVI was given a funerary monument by the sculptor Luigi Amici.^[101] The Camaldolese monk thus rests among the great pontiffs of history, at the heart of the Christian Rome he sought to defend against the modern age.

The Verdict of History and the Contrast with Pius IX

How should Gregory XVI be judged? History remembers a pontiff pious, learned, and upright, but whose temporal government yielded nothing to the reforms demanded. On the religious and missionary front, his record is considerable: firm defense of doctrine, condemnation of slavery, global expansion of the Church, promotion of an indigenous clergy, and patronage of the arts. Politically, his uncompromising reaction and refusal of reforms deepened a rift in the Papal States that would erupt two years after his death.

The contrast with his successor is striking. On 16 June 1846, the conclave elected, as the moderate candidate, Cardinal Mastai-Ferretti, who took the name Pius IX and was initially seen as a liberal reformer—the exact opposite of Gregory XVI.^[102][103] The illusion was short-lived: the revolution of 1848 forced Pius IX into exile and brought him back to intransigence. This suggests Gregory XVI may not have been wrong in his diagnosis—the violence of the revolutionary spirit—even if he erred in his remedy.

Gregory XVI remains, in the long gallery of popes, the figure of the intransigent and missionary monk: a sincere man of God who believed he was serving the Church by maintaining the old order in his States, but who, in doing so, opened the doors of the world to the Gospel.

• Pope Pius VIII (1761–1830) — his predecessor, whose death in 1830 opened the long conclave of 1830–1831.
• Blessed Pius IX — his successor, elected in 1846 as a liberal candidate, and the pope of the end of temporal power.
• Pope Leo XII (1760–1829) — the figure of uncompromising Restoration whose line Gregory XVI continued, and the pope who created him cardinal.
• Pope Gregory XV (1621–1623) — founder of the Congregation for the Propagation of the Faith (1622), of which Gregory XVI was prefect before his election.
• Condemned Catholic Liberalism — the controversy of Lamennais and L'Avenir, condemned by Mirari vos.
• The Syllabus of Pius IX (1864) — the great summary of modern errors, a direct heir of Mirari vos.
• Slavery of Blacks and the Catholic Church — the complete dossier of In supremo apostolatus and the Magisterium against slavery.
• Papal Infallibility (1870) — the dogma Cappellari defended as early as 1799 in Il Trionfo della Santa Sede.
• The Papal States (756–1870) — the temporal framework of the revolts of 1831 and their repression.