Saint Ambrose of Milan

I. Introduction: The Two Ambroses

There are two Ambroses of Milan, and the distance between them is one of the more instructive fissures in the historiography of Late Antiquity. The first is the Ambrose of the tradition: the fearless bishop who barred the emperor Theodosius from the doors of his cathedral until the master of the Roman world had done public penance in sackcloth for the blood of Thessalonica; the intrepid prophet who told a boy-emperor’s Arian mother that the things of God lay beyond the emperor’s reach; the saint whose very infancy was marked by a swarm of bees settling on his mouth in portent of his honeyed eloquence. This Ambrose is the creature of hagiography, of Baroque altarpieces by Rubens and van Dyck, and of a certain confessional historiography that saw in him the founding hero of the Church’s liberty against the state. He is a figure of granite, all conviction and no calculation, and he has proved remarkably durable.

The second Ambrose is a more recent arrival, though he is arguably closer to the man who governed the church of Milan between 374 and 397. He is the Ambrose recovered by the source-critical scholarship of the last half-century, above all by Neil B. McLynn’s Ambrose of Milan: Church and Court in a Christian Capital (1994), a book that Robert Markus commended precisely for “keeping well clear of either hagiography or denigration.” This Ambrose is a senatorial aristocrat to his fingertips, a former provincial governor who never quite ceased to be one, a consummate manager of men and events who, in Hal Drake’s memorable characterisation of McLynn’s portrait, was a “sweat-soaked saint who knew how to struggle and improvise.” He was, in McLynn’s own recurring metaphor, less the hero of his confrontations than their impresario: the man who staged them, narrated them, and—crucially—wrote them down in the form by which posterity would remember them. The central methodological insight of the revisionist reading is that almost everything we know about Ambrose’s most famous deeds we know because Ambrose, or his authorised biographer, chose to tell us, and told us in a manner calculated to serve his memory.

This essay takes that insight as its organising thesis. It argues that Ambrose of Milan is best understood not as the spontaneous prophet of the hagiographic imagination but as a figure whose extraordinary authority was constructed—assembled out of the political instincts of his senatorial class, the strategic deployment of popular support, the theatre of relics and miracles, and, above all, an unrelenting programme of literary self-presentation that his notary Paulinus subsequently canonised. To say this is not to reduce Ambrose to a cynic or a fraud; that would merely substitute denigration for hagiography, the error Markus warned against. It is rather to insist that his greatness lay in his art, and that the art was inseparable from the man. The paradox this essay seeks to hold in view is that the constructed Ambrose and the genuinely consequential Ambrose are the same person. The principle he bequeathed to the Latin West—that the emperor stands within the Church and not above it—was real and epochal in its consequences, even though the most celebrated episode said to embody it, the confrontation at the cathedral door, very probably never happened.

To develop this argument, the essay proceeds in seven movements. It begins with the documentary predicament: the peculiar nature of the sources, dominated as they are by Ambrose’s own voice and by a hagiographer writing at Augustine’s request, and the historiographical turn that has taught scholars to read that voice against the grain. It then examines the senatorial formation that gave Ambrose his habits of command, before turning to the acclamation of 374, the founding scene of his legend, as a case study in the interplay of event and construction. The longest movement anatomises the confrontations with imperial power—the Altar of Victory, the basilica crisis, Callinicum, and Thessalonica—as staged and narrated performances of episcopal authority. Two further movements treat the theatre of the holy, in the invention of the martyrs Gervasius and Protasius, and the intellectual mask of Greek learning and Neoplatonism that culminated in the conversion of Augustine. A final section considers Ambrose the poet, whose hymns fused doctrine, devotion, and combat into a single instrument, before the conclusion returns to the paradox with which we began.

The Documentary Predicament: Sources and the Historiographical Turn

Any responsible account of Ambrose must begin with a frank reckoning of how little of him reaches us unmediated. The earliest connected biography, the Vita Ambrosii, was composed around 422—a full quarter-century after the bishop’s death—by Paulinus, a deacon and former notary of the Milanese church, and it was written, Paulinus tells us, at the express request of Augustine of Hippo¹. This provenance is a double-edged inheritance. On one hand, Paulinus had known Ambrose personally and had access to the recollections of Marcellina, Ambrose’s sister, and of others in the bishop’s circle; his testimony is not fantasy spun from nothing. On the other, the Vita belongs squarely to the emergent genre of Latin monastic hagiography, modelled on Athanasius²’s Life of Antony and on Sulpicius Severus’s Life of Martin, and it deploys the conventions of that genre without embarrassment: the portentous infancy, the prophetic dreams, the demons who confess the saint’s power, the miracles that cluster thickest at precisely the moments of greatest polemical utility. Boniface Ramsey, whose Ambrose (1997) remains among the most judicious introductions in English, warns that the work is “a bit fantastical at points,” and Émilien Lamirande’s studies have established both its date and its firmly hagiographical purpose. Paulinus did not set out to write history in the modern sense; he set out to secure a cult.

The far larger body of evidence is Ambrose’s own writing, and here the difficulty is subtler and more pervasive. Ambrose is one of the most copiously self-documenting figures of Christian antiquity: his treatises, his sermons, his funeral orations, and above all his letters furnish an apparently intimate record of his thoughts and deeds. The letters in particular—the accounts of the Altar of Victory dispute, the report of his embassy to the usurper Magnus Maximus, the correspondence with Theodosius over Callinicum and Thessalonica—read like the raw dispatches of a statesman caught in the act. But this apparent immediacy is itself an artefact of design. Ambrose curated his correspondence for publication, arranging and in some cases evidently revising it, and the version of events it preserves is the version he wished to survive. McLynn’s fundamental contribution was to recognise that the corpus constitutes not a transparent window onto Ambrose’s career but what he called the bishop’s “painstaking presentation of self.” The letters are not neutral reports of confrontations; they are the confrontations’ afterlives, composed to fix a particular interpretation in the record. When Ambrose tells us that he faced down an emperor, we are reading his own account of a victory he had every incentive to magnify—and, in at least one instance, an account that omits inconvenient facts and substitutes a triumph for what may have been closer to a stalemate.

The historiographical trajectory of Ambrosian studies can be read as a slow awakening to this problem. The great biographies of the earlier twentieth century—F. Homes Dudden’s monumental two-volume The Life and Times of St. Ambrose (1935) and the studies of Jean-Rémy Palanque—were works of prodigious learning that nonetheless tended to take Ambrose’s self-account largely at face value, reconstructing his career from his writings much as those writings invited. They gave us the Ambrose of granite conviction, magnified by their own erudition. The Italian tradition, centred on the Biblioteca Ambrosiana in Milan and represented by Angelo Paredi’s S. Ambrogio e la sua età (1960) and later by Cesare Pasini’s Ambrogio di Milano: azione e pensiero di un vescovo (1996), enriched this picture with an unrivalled command of the local, liturgical, and manuscript evidence, and with a sensitivity to Ambrose’s place in the civic and religious identity of Milan that anglophone scholarship has sometimes lacked. But the decisive reorientation came in the 1990s, with McLynn’s book and with the broader current of scholarship associated with Peter Brown, whose work on the rise of the holy man and the cult of the saints had already taught historians to see late-antique sanctity as a social and political construction, and with J. H. W. G. Liebeschuetz, whose translations and studies (notably Ambrose of Milan: Political Letters and Speeches, 2005) placed the political correspondence at the centre of interpretation.

The result is a mature methodological consensus, if not a uniform one, that reads Ambrose’s every self-report as evidence needing to be interrogated rather than transcribed. This does not mean that scholars have descended into a corrosive scepticism in which nothing can be known; the events of Ambrose’s public life are, by the standards of the fourth century, unusually well attested, sometimes by independent witnesses such as Augustine. It means rather that the historian’s task has shifted from paraphrasing Ambrose to reconstructing the gap between what happened and what Ambrose said happened—and to asking why the gap takes the shape it does. The revisionist reading is not, at its best, a hostile one. McLynn is at pains, as his reviewers noted, to reveal Ambrose’s management of events “without making him too Machiavellian,” and Ramsey’s Ambrose remains a fundamentally spiritual man whose public actions were guided by spiritual conviction. The point is not that Ambrose was insincere but that sincerity and strategy were, in him, indistinguishable; he believed in his cause and he was superbly equipped to advance it, and the belief and the equipment worked as one. It is with the sources of that equipment—the formation of the man before he was ever a bishop—that any account of his authority must begin.

The Senatorial Habitus: Class, Family, and the Formation of a Governor

Ambrose was born, most probably in 339, into the governing aristocracy of the Western Roman Empire, and no single fact about him is more consequential for understanding his episcopate. His father, Aurelius Ambrosius, held or served within the praetorian prefecture of the Gauls, the highest regional administrative office in the Western empire, whose seat lay at Augusta Treverorum—Trier—then a principal imperial residence. The son was thus born at the summit of the imperial service, into a world in which the exercise of authority over men was not an aspiration but an inheritance. When the elder Ambrosius died, leaving his widow to raise three children in Rome, the family’s standing was undiminished; Ambrose received the education of a young man destined for the cursus honorum, the sequence of offices by which the sons of the elite ascended toward the great prefectures their fathers had held. He studied the Latin classics—Cicero, Virgil, Sallust—and acquired a competence in Greek unusual in the Latin West, and he trained in the law and rhetoric that were the working tools of the late-Roman governing class. This was not a religious formation; it was a formation for rule.

The point deserves emphasis because the traditional narrative tends to treat Ambrose’s secular career as a mere prologue, a worldly phase superseded by his true vocation on the day of his acclamation. The revisionist reading inverts this. On McLynn’s account, and on that of the broader current of scholarship that reads late-antique bishops as heirs to the civic role of the urban notable, Ambrose’s episcopate was not a repudiation of his senatorial formation but its continuation by other means. The bishop of a great late-Roman city had become, by the later fourth century, a figure of civic weight comparable to the old magistrates: he administered a substantial patrimony, adjudicated disputes, distributed patronage and charity, represented his community before the imperial power, and commanded the loyalty of the urban populace. For a man trained to govern a province, the transition to governing a church was less a rupture than a redeployment of skills already possessed. Ambrose brought to the see of Milan the administrative competence, the rhetorical command, the instinct for the management of crowds and courts, and the sheer expectation of being obeyed that his class and his career had instilled. When he later faced down emperors, he did so with the assurance of a man who had himself dispensed imperial justice.

The family into which he was born reinforced this inheritance with a second, and for his purposes equally usable, form of prestige: a Christian pedigree crowned by a martyr. The family had been Christian for generations, and it counted among its ancestors the virgin Soteris, who had suffered death in the persecution of Diocletian around 304. Ambrose invokes her memory with unmistakable pride in his treatises on virginity, holding her up as proof that the nobility of the faith outranked the secular dignities of even the most illustrious senatorial house—dignities, he insisted, that could perish, whereas the dignities of faith could not. This was a characteristic move. Ambrose possessed, and knew he possessed, two distinct forms of aristocratic capital: the worldly prestige of the gens and the spiritual prestige of a martyr’s blood, and he deployed each as the occasion required, sometimes setting one above the other rhetorically while drawing on both in practice. His siblings amplified the family’s sanctity into something like a dynasty of the holy: his elder sister Marcellina had taken the veil of consecrated virginity from the hands of Pope Liberius himself, around 353, and became the dedicatee of his most important ascetic writings and the recipient of his most intimate letters; his brother Satyrus, on Ambrose’s unexpected elevation, resigned his own provincial governorship to come to Milan and manage the temporal affairs of the diocese, freeing the new bishop for his spiritual and political work.

That fraternal self-sacrifice is itself revealing of the world Ambrose inhabited, in which the resources of an entire aristocratic household could be mobilised behind the career of one of its members. Satyrus’s death around 378, following a dramatic shipwreck from which he was believed to have been delivered by his devotion to the Eucharist, gave Ambrose the occasion for the two funeral orations, later transmitted as the De excessu fratris Satyri, that count among the earliest and most affecting of Christian consolatory panegyrics—and that, not incidentally, wove the private grief of a brother into a public demonstration of the family’s piety. Marcellina, who outlived both her brothers, preserved much of what was known of the family and served as a living link between Ambrose’s domestic sanctity and the cult that grew up around his memory. The three siblings—two consecrated to virginity and asceticism, one to the governance of the Church—form one of the most remarkable sibling groups in the history of Christian holiness, and it is difficult not to see in their collective sanctity both a genuine devotion and an asset of considerable value to a bishop who understood, as few did, how such assets could be made to work.

There remain, as always, genuine uncertainties beneath the confident outline. The precise identification of Ambrose’s father has been questioned, since the near-contemporary evidence is thin, and a minority of scholars have proposed alternatives to the standard reconstruction; the Italian historian Franco Cardini has drawn attention to what he called an “ambiguous silence” surrounding the elder Ambrosius, speculating that he may have been caught up in one of the political controversies of the age. The possible connection of Ambrose’s mother to the family of the Aurelii Symmachi, which would make the bishop a kinsman of his later pagan adversary Quintus Aurelius Symmachus, is intriguing but unproven. Even the birth year cannot be fixed with certainty: Ambrose’s own statement, in a letter of the early 390s, that he was fifty-three yields either 339 or 340, and older reference works give a range as wide as 337 to 340, with modern specialist convention, following McLynn, settling on around 339. These are not idle antiquarian quibbles; they are reminders that the granite Ambrose of the tradition rests on a foundation of inference and reconstruction, and that source-critical caution is required from the very first line of his biography. What is beyond doubt is the shape of the formation: a man bred to command, in a family that possessed both the prestige of the senate and the prestige of the altar, arrived at the threshold of his fortieth year as the governor of the province in whose capital the emperors themselves resided.

The Acclamation of 374: An Election as Political Theatre

The scene of Ambrose’s elevation to the episcopate is the founding image of his legend, and it is worth examining closely precisely because it is so often narrated and so rarely interrogated. In 374 the see of Milan fell vacant on the death of its Arian bishop Auxentius, a Cappadocian who had held the church for nearly two decades after being intruded into it during the exile of the Nicene bishop Dionysius. The succession threatened to reopen the bitter conflict between the Nicene and Arian parties in the most explosive fashion, for both factions were determined to secure a bishop of their own persuasion, and a contested popular election in a great city could easily spill into violence. As the responsible civil magistrate, the consularis of Aemilia and Liguria, it fell to Ambrose to preserve public order, and he accordingly went in person to the basilica where the assembly had gathered. There, according to Paulinus, as Ambrose addressed the crowd urging peace and moderation, a child’s voice—Paulinus specifies an infant—suddenly cried out “Ambrose bishop!” The cry was taken up by the whole assembly, and the two warring factions united, in Paulinus’s phrase, in a miraculous and unbelievable harmony to demand the governor as their bishop.

Read as hagiography, the episode is transparent: the voice of a child is the voice of God, the spontaneous unanimity is a divine sign, and Ambrose’s elevation is providential from its first instant. Read as history, it dissolves into something more complicated and more human. The core fact is secure and remarkable enough without embellishment: a still-unbaptised provincial governor was acclaimed bishop of a major see by popular demand, and this is among the best-attested events of his life. But the miraculous framing invites scrutiny. The child’s voice belongs to a recognisable repertoire of hagiographic topoi—the tolle lege that would later summon Augustine in the garden at Milan is its most famous cousin—and its function is to convert a political outcome into a supernatural one. The unanimity of the acclamation is almost certainly a hagiographic simplification of a more tangled negotiation. It is telling that Ambrose was acceptable to the Arian party, and modern accounts suggest this was because the charity and moderation he had shown in doctrinal matters made him appear a safe, neutral figure to both sides—a man each faction hoped it could work with. The acclamation, however spontaneous it may have appeared, served the interests of a Nicene party eager to install a powerful, well-connected, and orthodox patron in the church of the imperial capital, and the “spontaneity” of late-Roman crowds was, as historians of the period have long recognised, frequently orchestrated.

The episode of Ambrose’s reluctance, which follows the acclamation in every telling, repays the same double reading. Paulinus relates that Ambrose reacted to his election with genuine or at least strenuously performed horror, and that he sought to disqualify himself by staining his reputation—ordering the torture of prisoners, inviting prostitutes into his house—before finally attempting to flee the city under cover of night, only to find himself mysteriously returned to Milan. The matter was ultimately referred to the emperor Valentinian I, whose ratification of the popular choice Ambrose dared not resist, and on receiving an imperial letter praising the appointment, the colleague sheltering the fugitive surrendered him. Modern scholarship, and Ramsey in particular, has observed that the topos of episcopal reluctance was a thoroughly established convention: the humble candidate who flees high office, only to be compelled to accept it by the combined will of God and the people, was an expected element of the well-made ecclesiastical career, a demonstration of the humility that qualified a man for the very office he professed to shun. It is genuinely difficult to disentangle authentic hesitation—for the episcopate was a burden as well as a prize, and Ambrose’s unpreparedness was real—from hagiographic construction and from the candidate’s own understanding of how such a promotion ought to look. The reluctance, whatever its psychology, did not prevail, and it conformed with suspicious neatness to what the audience expected.

The most historically striking feature of the whole affair, and the one least susceptible to sceptical dissolution, is its violation of canonical order. Ambrose at the time of his acclamation was only a catechumen; he had not been baptised. Within the space of a single week he was baptised by a Nicene priest, advanced through the successive grades of the clerical hierarchy, and consecrated bishop of Milan—an elevation from unbaptised layman to metropolitan bishop in eight days that was canonically anomalous and would later be cited in debates over the irregular promotion of laymen. McLynn has established the consecration date as 7 December 374, the day still observed as Ambrose’s feast, correcting the argument for 373 advanced by Hans von Campenhausen and followed by Palanque and Dudden—a small but characteristic instance of how the revisionist scholarship has revised even the chronological scaffolding of the traditional account. Acutely aware of his want of theological preparation, Ambrose set himself at once to the systematic study of Scripture and doctrine, reportedly under the guidance of the learned priest Simplicianus, who would eventually succeed him; and as his first episcopal act he divested himself of his worldly goods, distributing his personal property to the poor and conferring his estates on the Church, reserving only a provision for Marcellina.

What emerges from this founding scene, when it is read with the grain of the evidence rather than the grain of the legend, is a pattern that will recur throughout Ambrose’s career. A genuine and dramatic event the acclamation of a governor as bishop is overlaid with a providential interpretation that converts political contingency into divine election, and this interpretation is transmitted to posterity in a form that Ambrose himself did nothing to discourage and that his biographer actively promoted. The improbable circumstances of the elevation, so far from being a source of embarrassment, became the cornerstone of a claim to divinely sanctioned authority that Ambrose would exploit for the rest of his life. He had not sought the office, the story said; God and the people had thrust it upon him against his will; his authority was therefore not his own but heaven’s. It is a formidable position from which to confront an emperor, and Ambrose would confront several. The construction of that position began at the very moment of his election, and it is impossible now to say how much of the construction was Ambrose’s design and how much the spontaneous work of the tradition. That impossibility is, in a sense, the point: the man and the legend were entangled from the first, and the entanglement was itself a source of power.

Bishop Against Emperor: The Anatomy of Constructed Confrontation

It must be said at the outset, against a persistent misconception, that Ambrose was in no sense the founder or member of a religious order in the medieval sense; the organised monastic orders lay centuries in the future, and his “order” was the episcopate itself and the institutional Church of the late fourth century. As bishop of Milan for some twenty-two years, Ambrose occupied one of the most strategically decisive sees in the Western empire, for Milan was the effective capital of the West and the residence of the imperial court, placing the bishop at the very fulcrum of relations between Church and state. His episcopate spanned the reigns of Valentinian I, Gratian, Valentinian II, and Theodosius I, and his dealings with these emperors define the evolving settlement between imperial and ecclesiastical power in the crucial decades when the empire was becoming, in fact as well as in law, a Christian polity. It is in these confrontations that the traditional Ambrose stands most heroically and that the revisionist Ambrose is most instructively recovered, for each of the great episodes turns out, on close inspection, to be a performance—staged, managed, and above all narrated—of an authority that Ambrose was in the very act of constructing.

Consider first the dispute over the Altar of Victory in 384. When the pagan senator Symmachus, prefect of the city of Rome and a kinsman of Ambrose by the possible family tie already noted, petitioned the young emperor Valentinian II to restore the Altar of Victory to the senate house—the altar before which generations of senators had sworn their oaths, and whose removal the Christian emperors had ordered—Ambrose responded with two letters (Epistulae 17 and 18) that rebutted Symmachus’s eloquent plea for religious toleration and insisted on the Christian emperor’s duty to the true God. The traditional account presents this as a clean victory of Christian conviction over pagan sentiment, and it is often cited as a landmark in the Christianisation of the Roman state. But the historian Alan Cameron, in his exhaustive study The Last Pagans of Rome (2011), has cautioned that Ambrose’s role in the ultimate decision may have been considerably less decisive than his own letters imply; the outcome was probably determined by the configuration of power at court rather than by the bishop’s intervention, and Ambrose’s surviving account is, characteristically, the account of a man claiming credit for a result he may only have influenced at the margins. The letters are magnificent as rhetoric and as a statement of principle; as evidence of what actually swayed the decision, they must be read with the awareness that they were composed to place Ambrose at the centre of a story in which his actual position may have been nearer the edge.

The basilica crisis of 385–386 offers a fuller and better-documented instance of the same dynamic, and here Ambrose’s management of events is on open display. The imperial court, under the influence of the Arian empress Justina, mother of the boy-emperor Valentinian II, demanded that Ambrose surrender a basilica in Milan for Arian worship—variously the suburban Portian basilica and a basilica within the walls. Ambrose refused outright, replying, in a formulation that drew on an ancient Roman legal principle whereby a temple consecrated to a god became that god’s property, that what belonged to God lay outside the emperor’s power. When Justina secured from Valentinian an edict in early 386 granting the Arians legal recognition and freedom of worship, and making it a capital offence to obstruct them—a measure aimed squarely at Ambrose—the bishop responded not by submitting but by occupying the contested basilica together with his congregation, who barricaded themselves within and kept vigil day and night while imperial troops surrounded the building. The standoff ended with the withdrawal of the imperial demand: a signal victory for the bishop over the court, and the source of the principle, cited well into the Middle Ages, that “the emperor is within the Church, not above it.”

Yet the very features that make the basilica crisis a triumph of episcopal firmness also reveal it as an exercise in the mobilisation of popular power, and Ambrose’s own account does not entirely conceal the fact. The crowd that filled and defended the basilica was the instrument of his resistance, and its loyalty was the true limit on imperial action; as the sources make clear, the emperor probably refrained from moving decisively against Ambrose not out of respect for his office but out of fear of what the Milanese populace might do. Franco Cardini has wryly noted that the supporting crowd was “spontaneously convened,” a phrase that captures the orchestrated quality of a spontaneity Ambrose knew how to summon. It was during this siege, moreover, that Ambrose introduced the antiphonal singing of psalms and hymns after the manner of the Eastern churches, ostensibly to sustain the morale of the frightened people through the long vigil—a pastoral innovation that was simultaneously a masterstroke of crowd management, binding the congregation together in song and giving them, quite literally, a common voice. The basilica crisis was a genuine confrontation and a genuine victory, but it was won by a bishop who understood that his power rested on the people and who deployed every resource—theological, legal, liturgical, and rhetorical—to keep the people with him. The heroism was real; it was also, and inseparably, a performance of great skill.

The affair of the synagogue at Callinicum in 388 exposes a harder edge of the same authority, and it is instructive precisely because Ambrose’s own management of the record is so nakedly visible. When Theodosius ordered a Christian community that had burned down a synagogue to rebuild it at its own expense—a straightforward application of the rule of law—Ambrose intervened with ferocity, arguing in a letter and in a sermon preached in the emperor’s very presence that no Christian emperor should compel Christians to finance a place of Jewish worship, and pressing Theodosius until the order was rescinded. To modern sensibilities the episode is among the most troubling of Ambrose’s career, revealing a coercive intolerance that sits uneasily with any heroic reading. What makes it revealing for our purposes is that later hagiographers tended to pass over Callinicum in silence, and that it was Ambrose himself who circulated a revised account casting his conduct in the most favourable light and himself as the victor. McLynn notes that Ambrose secured his immediate point but that the affair was in some respects a defeat for the emperor’s authority and an ambiguous episode for the bishop’s reputation—an ambiguity that Ambrose’s own selective memory worked to erase. Here the construction of the record is not a matter of subtle emphasis but of active curation: an inconvenient episode reshaped by its protagonist into a demonstration of his power.

All of these episodes, however, are eclipsed in the tradition by the confrontation with Theodosius over the massacre of Thessalonica in 390, and it is here that the gap between the traditional and the revisionist Ambrose yawns widest—and here, accordingly, that the essay’s argument finds its sharpest illustration. The facts of the atrocity are grim and largely agreed: after the population of Thessalonica had rioted and lynched the garrison commander Butheric in a dispute over the arrest of a popular charioteer, Theodosius authorised a savage reprisal, and in April 390 imperial troops fell upon the citizens gathered in the city’s hippodrome and slaughtered them in their thousands—about seven thousand, according to the church historian Theodoret, whom John Curran follows in The Cambridge Ancient History. The traditional account of what followed is one of the most celebrated scenes in the history of Christianity: Ambrose, it is said, barred the emperor from the doors of the cathedral of Milan and from communion, refusing to admit the master of the Roman world until he had performed public penance in the sight of the congregation, and Theodosius, humbled, submitted, appearing as a penitent stripped of his imperial robes. The scene was immortalised by Rubens and van Dyck, and it became the paradigmatic image of the triumph of spiritual over temporal power—the moment, in the words of one popular account, when the Church first triumphed over the state.

The scene is, in all probability, a pious fiction. This is not a marginal revisionist provocation but something approaching a scholarly consensus, and it rests on a careful comparison of the sources. The dramatic encounter at the cathedral door appears not in any contemporary account but in Theodoret’s Ecclesiastical History, written some six decades later, probably between 449 and 455; Daniel Washburn has argued that the image of the mitred prelate braced in the doorway is a product of Theodoret’s imagination, the historian filling the gaps in the record with his own ideology, and Peter Brown likewise concludes that there was no dramatic confrontation at the door. McLynn states flatly that the encounter at the church door has long been recognised as a pious fiction. What the contemporary evidence—Ambrose’s own surviving letter to Theodosius—actually shows is something quite different and, for the revisionist reading, far more characteristic. Ambrose was absent from court during the massacre, and on being informed of it he wrote the emperor a private letter that McLynn describes as unusually tactful by Ambrose’s standards, a letter that offered Theodosius, in McLynn’s phrase, a way to save face and repair his public image. Drawing on the biblical example of King David, who repented at the prophet Nathan’s rebuke for the death of Uriah, Ambrose urged not a public humiliation but a discreet, semi-public act of penitence, and told the emperor that he could not give him communion until it was done. Theodosius complied on these terms: as Liebeschuetz observes, he came to church without his imperial robes until Christmas, when Ambrose openly admitted him to communion.

The reinterpretation does not deny that a penance occurred; it relocates the episode from confrontation to negotiation, and from spectacle to statesmanship. On the revisionist reading, Ambrose acted less as a fearless prophet publicly humbling a tyrant than as a skilful counsellor managing a public-relations crisis on the emperor’s behalf, offering a devout ruler—whose concern for his reputation as a pious Christian is well attested—a dignified path back to communion that served both men’s interests. The dramatic version, with its confrontation at the door, was the creation of a later age that needed a founding icon for the Church’s independence and found in Theodoret’s imaginative reconstruction exactly the icon it required. It is worth adding, with Malcolm Errington, that even the date of the episode rests on inference—it is universally placed in 390, yet no source actually fixes the year, the only chronological anchor being Theodoret’s remark that Theodosius celebrated Christmas in the church eight months after the penance was demanded. The Thessalonica affair is thus the essay’s argument in miniature: a genuine and consequential exercise of episcopal moral authority, transmitted to posterity in a magnificently dramatised form that the contemporary evidence does not support, a form that served the needs of the tradition rather than the facts of the case. The principle it came to symbolise—that even the emperor is subject to the moral discipline of the Church—was real and would echo through the medieval investiture controversies and beyond. The scene that came to symbolise the principle very probably never happened.

Beyond these set-piece confrontations, Ambrose was an indefatigable builder of the institutional and devotional life of his church, and this quieter work was no less an exercise of constructed authority. He was an energetic promoter of asceticism and virginity, preaching and writing in praise of consecrated chastity so insistently that, tradition held, mothers sought to keep their daughters from his sermons, and through his exaltation of the Virgin Mary as the archetype of consecrated virginity he became one of the founders of Western Marian devotion. He organised his episcopal household on a semi-monastic footing, set a personal example of austerity and long nocturnal vigils, ransomed captives even to the point of melting down the church’s plate, kept his door open to all comers, and exercised a metropolitan’s oversight over the churches of northern Italy that the Italian scholarship, Pasini above all, has documented in detail. In all of this Ambrose combined the roles of theologian, controversialist, statesman, and pastor in a single formidable personality, and transformed the church of Milan into a model for the Latin West. The transformation was genuine and durable; it was also, in every particular, the work of a man who understood authority as something to be built, performed, and recorded, and who was better at all three than perhaps any churchman of his age.

The Theatre of the Holy: Relics, Miracles, and the Invention of Gervasius and Protasius

If the confrontations with emperors reveal Ambrose’s mastery of political theatre, the invention of the relics of the martyrs Gervasius and Protasius in June 386 reveals his mastery of a sacred theatre no less potent, and it is perhaps the clearest single instance in his career of the deliberate mobilisation of the miraculous for a definite end. The discovery came at the very height of the basilica crisis, at the moment when Ambrose most needed a demonstration of divine favour against the Arian court, and its timing has led many scholars to see in it a calculated act of ecclesiastical strategy. Guided, by his own account, by a presentiment or vision, Ambrose ordered excavations before the chancel screen of the martyrs Nabor and Felix, and there were unearthed the skeletons of two men of extraordinary stature, together with quantities of blood, which he identified as the long-forgotten Milanese martyrs Gervasius and Protasius. The relics were translated to the newly built basilica—later renamed the Basilica Ambrosiana—and Milan, which Ambrose himself described as hitherto barren of martyrs, was furnished at a stroke with its own native heavenly patrons at precisely the juncture when the bishop needed heaven visibly on his side.

The miracles that accompanied the translation were as timely as the discovery. During the procession, according to Ambrose’s letter to his sister Marcellina, a blind butcher named Severus recovered his sight on touching the cloth that had covered the martyrs’ remains, and demoniacs at the tomb cried out in confession of the martyrs’ power. The Arians, as both Ambrose and Paulinus report, made light of these wonders and openly doubted the blind man’s cure, and Ambrose met their scepticism with two sermons affirming the reality of the miracles in terms of unusual and emphatic personal conviction. What distinguishes this episode from the general run of late-antique miracle narratives, and what makes it so valuable to the historian, is the exceptional quality of its attestation. The healing of Severus is reported not only by Ambrose himself, in a contemporary letter, and by Paulinus, in his later biography, but independently by Augustine, who was present in Milan at the time and who records the event in both the Confessions and the City of God, citing it as a genuine miracle of his own day—a notable concession from a writer who generally held that the age of miracles had passed. The presence of the emperor and a great concourse of people lent the cure a public visibility that made it difficult to deny; even the sceptical Edward Gibbon, centuries later, acknowledged the episode with heavy irony, conceding that he might have recommended it to the credulous had it not equally seemed to prove both the worship of relics and the truth of the Nicene creed.

The convergence of contemporary, near-contemporary, and independent testimony gives the invention of Gervasius and Protasius a documentary foundation unusual among ancient miracle claims, and the historian’s interest lies less in the physiology of the cure—which is beyond recovery—than in its function. For the episode illustrates with unusual clarity how the cult of relics operated in the fourth century as an instrument of orthodox polemic. The martyrs, discovered at the height of the Arian challenge, testified by their very presence and by the wonders worked at their tomb to the favour of heaven upon Ambrose’s Nicene cause; the demons who confessed the martyrs’ power confessed, by implication, the truth of the faith the martyrs had died for and the bishop now defended. This was not, on any plausible reading, a matter of naïve credulity on Ambrose’s part. It was the deliberate deployment of the sacred in the service of a doctrinal and political struggle, by a man who understood the cult of the saints as a weapon and who wielded it with precision at the moment of maximum utility. The relics were real, in the sense that bones were unearthed and a cult established; the interpretation placed upon them was Ambrose’s, and it served his cause.

This was, moreover, a sustained programme rather than a single improvisation. Ambrose went on to discover the relics of other martyrs—Vitalis and Agricola at Bologna, Nazarius and Celsus at Milan—extending the practice of relic-invention that had proved so effective in 386 and multiplying the heavenly patrons of the churches under his care. Modern scholarship tends to interpret these episodes less as verifiable events than as expressions of Ambrose’s pastoral strategy and of the developing religious sensibility of the age, in which relics functioned as conduits of divine power and as markers of orthodoxy in the topography of the Christian city. Ambrose was, in this respect, a pioneer of the Western cult of relics, and his promotion of the martyrs left a permanent mark on the sacred landscape and the liturgy of Milan. A further cluster of marvels attended his own death and posthumous cult, as recorded by Paulinus—visions of the bishop seen in distant places at the moment of his death, an apparition to the general Mascezel before his African campaign, cures and portents at the tomb—but these belong squarely to the genre of hagiography and are treated by modern source-criticism, from McLynn to Ramsey, with corresponding caution, as literary constructions designed to establish and propagate the cult rather than as historical reports. The distinction between the historically documented and the hagiographically embellished is nowhere more important than in this final category, and it yields a useful formulation: Ambrose the miracle-worker is largely the creation of his biographer and his cult, whereas Ambrose the promoter of miracles is a securely historical, and highly strategic, figure.

The Greek Mask: Learning, Neoplatonism, and the Making of Augustine

Ambrose’s authority was not solely political and sacral; it was also, and profoundly, intellectual, and here too the mature scholarship has qualified the traditional portrait in ways that deepen rather than diminish it. The older reference works credited Ambrose with an excellent knowledge of Greek that set him apart from most of his Latin contemporaries, and the claim is not false: Ambrose could genuinely read Greek and worked directly with Greek Christian and Neoplatonic texts, an accomplishment rare in the fourth-century West and decisive for his theological work. But the character of that engagement has been more precisely defined by modern specialists, above all in Goulven Madec’s Saint Ambroise et la philosophie (1974), which remains the key assessment of both the reality and the limits of Ambrose’s Hellenism. The picture that emerges is nuanced. Ambrose’s method was heavily compilatory and adaptive: he paraphrased, translated, and reworked his Greek sources rather than producing wholly independent speculation, and this is precisely why source-critical scrutiny of his borrowings has been so intense, beginning already in his own lifetime. Jerome pointedly accused him, in a famous letter, of assembling his Hexaemeron out of Origen, Hippolytus, and Basil in such a way as to pass off borrowed matter as his own—a charge that modern scholarship has partly confirmed while also recognising a genuine Ambrosian originality in his selection and Christological application of his materials.

In scriptural exegesis, Ambrose stood within the Alexandrian tradition, drawing above all on Philo of Alexandria and Origen for the allegorical method that discerned literal, moral, and mystical senses beneath the letter of the text; he treated the Jewish exegete Philo as one of the faithful interpreters of Scripture, and his Hexaemeron leans heavily on Philo, Origen, and Basil of Caesarea’s homilies on the six days of creation. In dogmatic theology his chief guides were the Greek Fathers of the Nicene party—Athanasius, Basil, Didymus the Blind, Cyril of Jerusalem—and his treatise De Spiritu Sancto draws so extensively on Basil and Didymus that it functions in part as a conduit of Cappadocian pneumatology into the Latin West. He corresponded with Basil directly, and the significance of this mediating role can scarcely be overstated: at a moment when the Greek East and Latin West were beginning the slow estrangement that would culminate centuries later in schism, Ambrose rendered the riches of the Cappadocian and Alexandrian traditions accessible to a Latin readership, and thereby laid a foundation for much of subsequent Western theology. His Hellenism was real but instrumental, a learning placed always at the service of pastoral and polemical ends; he was a synthesiser and transmitter of Greek thought rather than a speculative philosopher, and this qualified assessment corrects both the older hagiography and any excessive scepticism.

Nowhere is the strategic character of Ambrose’s learning more consequential than in his transmission of Neoplatonism, a dimension of his thought illuminated above all by the researches of Pierre Courcelle. In his landmark Recherches sur les Confessions de saint Augustin (1950) and in a series of related studies, Courcelle demonstrated that Ambrose’s sermons—particularly the De Isaac vel anima and the De bono mortis—are saturated with reminiscences of the Enneads of Plotinus, whom Ambrose at times paraphrased and adapted at length. The demonstration overturned the older view, associated with Prosper Alfaric, that Augustine’s intellectual conversion had been a turn to a bare Neoplatonism only later reconciled with Christianity; on Courcelle’s reading, Augustine encountered at Milan a Christianity already permeated by Neoplatonic philosophy, mediated through Ambrose’s preaching and through the “Milanese circle” of Christian Neoplatonists gathered around the priest Simplicianus. James O’Donnell has called the exposure of this Platonic permeation of Christian intellectual discussion around Ambrose Courcelle’s greatest achievement, and Peter Brown regarded the work as foundational for all subsequent study of the question. The details remain contested—Pierre Hadot extended the demonstration, while Heinrich Dörrie argued that in the De Isaac Ambrose had drawn on a lost treatise of Porphyry rather than directly on Plotinus, a Porphyrian attribution Courcelle resisted—but the essential point stands: Ambrose was a crucial channel through which pagan Neoplatonic philosophy entered the Latin Christian tradition, and his sermons dressed the Plotinian ascent of the soul in Christian garb, giving his spirituality a contemplative depth that would prove enormously influential.

That influence found its supreme vehicle in a single human relationship, the most historically consequential of Ambrose’s life: his role in the conversion and baptism of Augustine of Hippo. Augustine, a professor of rhetoric newly arrived in Milan in 384, first came to hear Ambrose preach out of professional interest in his technique, but found himself gradually won over by the substance of the teaching. As Augustine records in the Confessions, Ambrose received him kindly, like a father, and it was Ambrose’s allegorical exposition of the Old Testament—the very method he had drawn from Philo and Origen—that dissolved the Manichaean objections which had long barred Augustine from the Catholic faith, showing him that the difficulties of the Hebrew scriptures yielded to a spiritual reading. Ambrose baptised Augustine, together with his son Adeodatus and his friend Alypius, at the Easter vigil of 24–25 April 387 in the cathedral of Milan. Through Augustine, Ambrose’s exegetical method, his Neoplatonised Christianity, and his conception of the Church passed into the mainstream of Latin theology and were magnified through the most influential mind the Latin tradition would produce. The persistent legend that the two men jointly composed the Te Deum on that occasion is groundless and universally rejected, a characteristic instance of the tradition’s impulse to embellish an already momentous encounter; but the encounter itself needs no embellishment. No other single relationship in Ambrose’s life had so vast a historical consequence, and it ensured that the Milanese bishop’s influence would be transmitted, and transformed, by the greatest of the Latin Doctors.

Song as Weapon: Hymnody, Liturgy, and the Ambrosian Voice

Among the many instruments of Ambrose’s authority, none has proved more enduring, or more revealing of his genius for fusing the devotional and the strategic, than his contribution to Latin hymnody. Ambrose is universally credited with pioneering the metrical Latin hymn, composed in stanzas of four lines of iambic dimeter—a form so influential that it became the standard for Latin hymnody for more than a thousand years and lent his name to the whole genre of “Ambrosian” hymns. The occasion of the innovation, as we have seen, was the basilica crisis of 386, when Ambrose introduced the antiphonal singing of psalms and hymns to sustain his besieged congregation through their long vigil; Augustine, an eyewitness, records the practice and its emotional power in the Confessions. The hymns were thus born as an instrument of solidarity in a political crisis, a means of binding a frightened crowd into a single body with a single voice, and this origin is emblematic of their double character throughout Ambrose’s use of them. They were devotional and they were doctrinal; they consoled and they combated; composed in part to fortify the orthodox faithful against Arianism, they taught Nicene theology through song, lodging correct doctrine in the memory and on the lips of a congregation in a form far more durable than any sermon.

The authentic corpus is smaller and more contested than the tradition long supposed, and its boundaries illustrate once again the value of source-critical care. Augustine, a contemporary witness, explicitly attests four hymns as genuinely Ambrose’s: the dawn hymn Aeterne rerum conditor; the evening hymn Deus creator omnium, which he quotes and names; Iam surgit hora tertia; and the Christmas hymn Veni redemptor gentium. These four form the secure core. Beyond them the attributions grow uncertain: the nineteenth-century Milanese scholar Luigi Biraghi, followed by Guido Maria Dreves and Clemens Blume, ascribed eighteen hymns to Ambrose, while the standard modern critical edition prepared under the general editorship of Jacques Fontaine accepts thirteen of the fourteen traditional hymns as genuine, and Helmut Gneuss, at the sceptical end, accepts only the four Augustinian hymns as certain and allows the possible authorship of six more. Many hymns later attributed to Ambrose, including the Te Deum laudamus once fancifully connected with Augustine’s baptism, are now regarded as inauthentic. The debate is not merely antiquarian; it bears directly on how much of the “Ambrosian” achievement can be credited to Ambrose himself, and it is a useful check on the tendency of a great name to attract to itself the works of lesser or later hands.

From this hymnodic innovation flowed a still broader legacy in the liturgical life of the Western Church. Ambrose’s name is attached to the Ambrosian Rite, the distinct liturgical use that survives to this day in the Archdiocese of Milan and certain neighbouring dioceses—one of the very few non-Roman Latin rites to endure—and to the tradition of Ambrosian chant. Here again the mature scholarship counsels precision: the Ambrosian Rite as it survives is the product of centuries of development and cannot be attributed to Ambrose himself in its detail, though its core may reflect his influence, and the same caution applies to the body of chant that bears his name. What can be said with confidence is that Ambrose’s introduction of congregational hymn-singing and antiphonal psalmody permanently enriched the worship of the Latin Church, and that the strophic form he favoured became the vehicle for a millennium of Latin devotion. In the hymns, more perhaps than anywhere else in his vast output, the theologian, the pastor, the controversialist, and the poet are united in a single achievement; they are the most intimate and accessible expression of his genius that survives, and they carried his voice, quite literally, into the mouths of the faithful for a thousand years.

Conclusion: The Constructed and the Genuine

Ambrose died in Milan during the night between the third and fourth of April 397, at the dawn of Holy Saturday, having fallen gravely ill in the closing months of his life. Paulinus, who was present, reports that the bishop had foretold he would live until Easter, and that in his final hours he lay with his arms extended in the form of a cross, his lips moving in silent prayer; and when the regent Stilicho, fearing that Ambrose’s death would bring ruin upon Italy, sent leading citizens to beg him to pray for a prolongation of his life, Ambrose replied, in words Augustine long admired, that he had not so lived among them as to be ashamed to live, nor did he fear to die, for they had a good Lord. He received the viaticum from the hands of Honoratus, bishop of Vercelli, and immediately breathed his last, at about the age of fifty-seven, having governed the church of Milan for some twenty-two years. There is no suggestion in the sources of any cause but natural illness, borne with the composure of a man long prepared. He was buried on Easter Day in the basilica that bears his name, where his body rests still, flanked by the martyrs Gervasius and Protasius whose invention had served him so well in life. Even in death, the arrangement was fitting: the impresario lies between the two saints he had summoned from the earth.

The argument of this essay has been that the traditional Ambrose—the granite prophet of the altarpieces, humbling emperors at the cathedral door—is largely a construction, assembled in part by Ambrose himself through the most sustained programme of literary self-presentation to survive from Christian antiquity, and completed by a hagiographer writing to establish a cult. The confrontation at the door of the cathedral very probably never took place; the penance of Theodosius was a discreetly negotiated act of statesmanship rather than a public humiliation; the invention of the martyrs was a strategic deployment of the sacred at the moment of maximum political need; the acclamation of 374 was overlaid with a providential interpretation that converted political contingency into divine election; even the extent of Ambrose’s decisive influence in the Altar of Victory dispute and the coherence of his heroism at Callinicum have been qualified by the mature scholarship. To read Ambrose with the grain of the evidence rather than the grain of the legend is to encounter, again and again, the gap between what happened and what Ambrose said happened, and to recognise that the gap was neither accidental nor innocent but the product of a supremely skilled manager of his own memory.

And yet the essay has also insisted, throughout, that this recognition must not curdle into denigration, the equal and opposite error to hagiography. For the genuine Ambrose and the constructed Ambrose are the same man, and his greatness lies precisely in the art by which he made himself. That a senatorial governor became, within a week and against canonical order, the bishop of the imperial capital, and then governed that see for twenty-two years with such authority that four emperors reckoned with him, is not a fiction; it is one of the best-attested and most remarkable careers of the fourth century. That he defended Nicene orthodoxy with a tenacity that helped secure its triumph in the West, that he transmitted the riches of Greek theology and philosophy to a Latin readership, that he shaped the conversion of Augustine and thereby the whole course of Western thought, that he gave the Latin Church its first great tradition of hymnody—all of this is real, and none of it is diminished by the recognition that Ambrose knew how to tell his own story. The construction was the achievement. He built his authority as a great architect builds a cathedral, out of the materials to hand—his class, his family, his learning, his people, his relics, his songs, and his words—and the edifice has outlasted the empire in which he raised it.

The most durable stone in that edifice is the principle for which Ambrose is invoked, in the Latin West, more than any other figure: that the emperor stands within the Church and not above it, that even the master of the world is subject, in the sphere of faith and morals, to the discipline of the bishop. Ambrose gave this principle both its formulation and its founding exempla, and through his imperial funeral orations he bequeathed to the Middle Ages the correlative image of the Christian emperor as a dutiful son of the Church, serving under orders from Christ. The principle would echo down the centuries: through the Gelasian doctrine of the two powers at the end of the fifth century, which drew on the same tradition of episcopal independence; through the investiture controversies of the eleventh and twelfth; and through every subsequent contest between spiritual and temporal authority in the West. That this immense legacy rests, in its most famous dramatisation, on a scene that Theodoret probably invented is one of the finer ironies of intellectual history—and a fitting monument to a man who understood, better than anyone of his age, that authority is not merely exercised but staged, not merely won but narrated. The scene at the cathedral door is a fiction. The principle it came to embody is among the most consequential inheritances of the Latin Middle Ages. Ambrose of Milan, impresario and saint, would have appreciated the arrangement.