Conrad of Marburg

← Encyclopedia

In the summer of 1233 a small party rode out of Mainz toward Marburg, and on the road a band of knights cut it down. The man they killed had, weeks before, held the power to send a German count to the stake on his word alone. That collapse — from a tribunal answerable to no one into a corpse on a Rhineland road — is the whole arc of Conrad of Marburg compressed, and it is the arc the sources keep returning to, because almost everything else about him survives only at second hand. He left no body of writing of his own beyond the brief life of a saint, and so he is known through the chroniclers who recorded his fervor, the papal letters that armed him, the one bull that bears the mark of his reports, and the count whose acquittal undid him.

Conrad of Marburg (c. 1180–1233), the German preacher and papal inquisitor — historical portrait, via Wikimedia Commons (public domain).

Conrad (c. 1180–1233) was a German secular priest — a cleric attached to no monastic order — and an itinerant preacher of austere reputation, who became, by papal commission, one of the first inquisitors in the Holy Roman Empire. What is firmly known of his early life is little. He appears in the records already formed: a man of theological learning and forceful eloquence, an ascetic in his own habits, trusted by the papacy first to preach the crusade — he is heard of as a vigorous promoter of the expedition proclaimed in 1213 by Innocent III — and then to enforce penance and root out dissent. The asceticism was not a private discipline only; it was the temper he carried into every office he held, and it shaped both halves of the reputation that outlived him.

Confessor to a saint

The first reason his name endured is a woman he directed toward sanctity. After the death of her husband Ludwig IV, Landgrave of Thuringia, on crusade in 1227, the young widowed landgravine Elizabeth of Hungary placed herself under Conrad’s spiritual authority. She had taken him as confessor while her husband still lived, and as a widow she bound herself to him by vows of obedience and chastity resembling a nun’s. What followed is among the most contested relationships in the history of medieval sanctity.

Elizabeth of Hungary, the widowed landgravine who placed herself under Conrad’s direction — detail of a fresco (c. 1320) in the Lower Basilica of San Francesco, Assisi, by Simone Martini, via Wikimedia Commons (public domain).

The record describes a regime of severe discipline. Conrad made her send away her children; he ordered the dismissal of the women who had been her closest companions and had shared her exile; he forbade her to give alms without his leave, refused her wish to beg or to enter a convent, and is reported to have corrected her with corporal penance — blows administered for disobedience. The sources that preserve this hold it in two irreconcilable lights. To her hagiographers, and to the canonization court that weighed her cause, the harshness was the forging of a saint: the breaking of a great lady’s will until nothing stood between her and God. To most modern historians the same facts read closer to coercion — the domination of a vulnerable widow by a director who acknowledged no limit to his authority. The two readings draw on the same testimony and cannot both be the whole truth; the documents do not adjudicate between them, and the honest account leaves the tension standing.

When Elizabeth died on 19 November 1231, at twenty-four, Conrad moved with characteristic speed to make her a saint. Deputed with the Archbishop of Mainz and the Abbot of Eberbach to examine witnesses, he composed the Summa vitae — a compact summary of her life and virtues, written between his August 1232 interviews and Gregory IX’s reply that October, and addressed to the pope as the opening document of her cause. It is the only sustained text certainly from his hand. Around it the canonization process assembled the fuller testimony of her four closest handmaids, the Dicta quatuor ancillarum, and depositions on some 130 miracles. The cause moved with unusual swiftness: Elizabeth was canonized at Perugia on 27 May 1235, less than four years after her death and barely two after Conrad’s own. Kenneth Baxter Wolf’s study and translation of the canonization dossier (2011) sets Conrad’s terse, severe portrait beside the handmaids’ warmer one, and recent scholarship — for instance work on the canonization, the Dominican order, and the inception of the papal inquisition in the 1230s — has read the saint-making and the heresy-hunting as a single chapter of one career, not two separate ones.

The Church of St. Elizabeth (Elisabethkirche) in Marburg, raised over her tomb after her canonization — one of the earliest fully Gothic churches in the German lands. Photograph by Heinrich Stürzl, via Wikimedia Commons (CC BY-SA 4.0).

The inquisition in the Rhineland

The second reason his name endured is the inquisition itself. On 11 October 1231 Pope Gregory IX granted Conrad sweeping authority to hunt heresy in the Rhineland — the first such commission of its kind in Germany, charging him to extirpate heretics, to denounce clerical concubinage, and to reform the religious houses. He exercised it without the procedural restraint that later inquisitorial practice, under the Dominicans and in the manuals of the next century, would slowly build in. Contemporary chroniclers describe a tribunal that took accusation as something near proof, offered the accused the choice between confession and the stake, and shaved the head of any who confessed and recanted while burning those who would not. Many went to the fire on slender evidence. Working the Upper Rhineland alongside two assistants — a layman remembered as Conrad Dorso and a one-eyed former heretic known as John — he spread a panic across western Germany, for he did not scruple to summon even powerful nobles before a court from which there was no appeal.

This campaign belonged to a wider thirteenth-century apparatus turned against dualism and its kin. The Rhineland and the Low Countries had been among the early western grounds where the dualist heresy later gathered under the name Catharism was reported — the German town of Cologne furnishing one of the earliest twelfth-century western notices of such dissent — the western reflex of the Balkan Bogomilism from which much of the historiography derives it. The same decades that saw Conrad’s fires in Germany saw the crusades against the Cathars of Languedoc grind toward their end and the papal inquisition take institutional shape across the middle-ages. But the German cases pose a sharper version of a question that hangs over the whole field. Modern scholarship is divided over how far an organized Cathar counter-church ever existed in the West at all — whether what the inquisitors found was a real, Bogomil-linked dualist movement (the reading of Steven Runciman, Bernard Hamilton, and Peter Biller) or substantially an artifact of the heresiographers’ own templates, projected onto local religious life that did not fit them (the reading developed by R. I. Moore and pressed further by Mark Pegg). Conrad’s tribunal sits at the most extreme end of that problem, because it generated no register, kept no record one can read against the polemic, and produced its “evidence” under coercion. Whether the people he burned were Cathars, lapsed believers, personal enemies, or simply the accused of a credulous court is, for the German cases, largely beyond recovery — which is itself the heart of the problem his career poses.

Vox in Rama and the manufacture of a cult

Out of Conrad’s reports came one of the most consequential documents in the prehistory of the European demonology of the devil. In June 1233 Gregory IX issued the bull Vox in Rama, addressed to the Archbishop of Mainz and the Bishop of Hildesheim and lending the full weight of the curia to Conrad’s campaign. The bull describes, in lurid detail, the initiation of a supposed Luciferian sect said to be flourishing in Germany. The novice, it says, is met first by a toad the size of a goose or a dog; then by a gaunt, deathly pale man whose kiss drains from the initiate every memory of the Catholic faith; then a black cat, descending tail erect, is kissed by initiate and master in turn upon the hindquarters; a presiding figure of darkness completes the rite, and the gathering dissolves into nocturnal obscenity. Lucifer himself, in this telling, is worshipped as the wronged firstborn of heaven who will one day be restored.

Pope Gregory IX, who issued the bull Vox in Rama in June 1233 — thirteenth-century fresco from the Sacro Speco monastery at Subiaco, via Wikimedia Commons (public domain).

It is necessary to be exact about the status of this account. The bull is not a record of anything that happened; it is a construction — among the earliest fully elaborated demonologies of a heretical cult to circulate with official papal sanction, and one whose template would echo for three centuries down into the witchcraft trials and the sabbath imagined in them. Where its details came from is part of what makes it dark. They have the shape of confessions, and a papal official later sent to Marburg warned Gregory that Conrad had extracted many of his confessions under torture or its threat, so that the demon-haunted cult described in Rome may be nothing more than the answers terrified people gave to the questions their interrogator already meant to ask. How much of the bull reflects Conrad’s own claims and how much the curia’s own elaboration of them is debated; what is not debated by serious historians is that no Luciferian church of toads and black cats existed to be found. The bull also marks the first papal text to bind the cat to diabolical worship, a slander with a long and well-documented afterlife in folklore. The standard modern study of this whole construction — the manufacture of an imaginary enemy and the projection onto it of inverted-rite fantasies — is Norman Cohn’s Europe’s Inner Demons (1975), which reads Vox in Rama and Conrad’s Rhineland as a foundational episode in the demonization of Christians by Christians.

The undoing

His ruin was reach. When Conrad accused Henry, Count of Sayn, of heresy — of consorting, in the bull’s idiom, with the cult — the count did not flee but demanded a hearing. The Archbishop of Mainz, Siegfried III, convened a synod of his suffragan bishops on 25 July 1233, at which the young King Henry was also present, and there the charge could not be made to stand. The count was acquitted. The verdict broke Conrad’s standing with a German episcopate that had grown alarmed at an inquisitor answerable to none of them and willing to turn his court on the great as readily as the poor. He refused the verdict and left Mainz unbowed. Five days later, on 30 July 1233, riding toward Marburg, he was set upon by a party of knights and killed, together with the Franciscan friar Gerhard Lützelkolb who rode with him. Gregory IX called for vengeance against the murderers; little came of it, and the German princes showed small appetite to avenge a man whose tribunal they had feared.

He survives, then, entirely in the accounts of others — defenders who saw a zealous and learned servant of the Church bent on the purity of the faith, and a far larger company, in his own time and since, who saw a fanatic whose certainty had slipped its restraints. The episode marks an early and cautionary moment in the institutional history of heresy-hunting: a measure of what unbounded inquisitorial power produced before the Church itself moved to constrain it.

Sources and scholarship

The primary record is almost entirely external to Conrad. The narrative of his career rests on thirteenth-century German chronicles — among them the Annales Wormatienses and the Gesta Treverorum — together with the papal letters of Gregory IX, whose 1227 letter praises Conrad’s preaching, whose commission of 11 October 1231 arms him, and whose bull Vox in Rama of June 1233 gives the demonology its curial form. His one surviving composition is the Summa vitae of Elizabeth, edited within the canonization dossier; the fuller testimony of her cause, the Dicta quatuor ancillarum and the miracle depositions, is translated and studied in Kenneth Baxter Wolf, The Life and Afterlife of St. Elizabeth of Hungary: Testimony from Her Canonization Hearings (Oxford University Press, 2011).

The foundational modern treatment of the inquisition in which Conrad figures is Henry Charles Lea, A History of the Inquisition of the Middle Ages, 3 vols. (New York, 1888) — long in the public domain — where the German campaign and its violence are set within the larger institutional story. The decisive study of Vox in Rama as a fabricated demonology, and of Conrad as its agent, is Norman Cohn, Europe’s Inner Demons (London, 1975; revised 1993), which traces the construction of the imaginary heretical cult and its descent into later witch-belief. The 1913 Catholic Encyclopedia entry on Conrad of Marburg, public-domain and sympathetic in framing, supplies a careful chronology of the offices, the crusade-preaching, the canonization role, and the murder. The wider field of medieval Western dualism into which his heresy-hunting fed is surveyed in the nineteenth-century syntheses of Charles Schmidt and J. J. I. von Döllinger and in the modern debate over whether organized Catharism existed at all — a debate that bears directly on what, if anything, Conrad’s German tribunal was actually hunting. The figure most often set beside him in that institutional history is a later and very different churchman: Benedict XII, the Avignon pope whose own inquisition into surviving Cathars in the Pyrenees left the meticulous register that became the Montaillou study — a careful interrogator’s archive against which Conrad’s torch-lit and undocumented court shows for what it was.

→ Related: Benedict Xii · Demonology · Asceticism · Middle Ages · Heresy · Catharism · Bogomilism · Dualism · Lucifer · Demon · Devil · Witchcraft · Crusades · Roman Empire