The Black Mass: History from Heresy Trials to Modern Satanism

The Black Mass is a ritual that parodies or inverts the Catholic Mass in honour of the Devil, or for magical ends. For most of its history it existed chiefly as an accusation made against heretics, witches and political enemies; the best-documented real case is the Affair of the Poisons at the court of Louis XIV, and the modern image of the rite was shaped above all by nineteenth-century French writers before Satanist groups adopted it as theatre in the twentieth century.

Inverted Rites in Medieval Accusations§

The idea that enemies of the Church worshipped the Devil in secret, obscene ceremonies is far older than the term "Black Mass", which became common only in the nineteenth century. Early Christian apologists had faced Roman charges of incest and cannibalism at their own meetings; in the Middle Ages Christian writers turned similar charges on dissidents. The chronicler Guibert of Nogent, writing in the early twelfth century, claimed that heretics near Soissons held nocturnal orgies and made a sacrament from the ashes of a child. Walter Map and others repeated comparable stories of secret assemblies in which a cat or a demon was venerated.

These narratives followed a stereotype that historians such as Norman Cohn traced across many centuries: a hidden society meets at night, renounces Christ, profanes sacred objects, practises sexual licence and kills infants. The trial of the Knights Templar after 1307 drew on the same pattern, with confessions extracted under torture describing spitting on the cross and the veneration of a mysterious head, the origin of the later Templar legends and the name Baphomet.

A different, more concrete abuse worried church councils: the misuse of genuine liturgy for harmful purposes. A council at Toledo in 694 is usually cited as condemning priests who said the Mass for the dead over a living person in order to bring about his death. Medieval and early modern clergy were repeatedly accused of saying masses over images, wax figures or love charms. Such practices show how the Mass was believed to carry power that could be redirected, a theme central to the medieval nigromancy discussed in Black Magic History.

The Witches' Sabbath and the Parody of the Mass§

During the European witch-hunts the image of the inverted rite was attached to the witches' sabbath. Demonologists described gatherings at which the Devil, often in the form of a goat or a black man, presided over a liturgy that mocked the Church: a sermon urging the witches to evil, an offering, and a counterfeit communion. The French judge Pierre de Lancre, whose Tableau de l'inconstance des mauvais anges et démons appeared in 1612 after his investigations in the Basque country, gave one of the most elaborate accounts, including a black host and a parody of the elevation. The Italian friar Francesco Maria Guazzo's Compendium Maleficarum (1608) offered illustrated scenes of witches renouncing their baptism.

Historians now treat these accounts as products of learned demonology, leading questions and coerced confessions rather than descriptions of real ceremonies. The sabbath was the theological counterpart of the Devil's pact: if witches had sworn allegiance to Satan, they must also worship him, and that worship was imagined as the Mass turned inside out. The resulting texts, read and reprinted in later centuries, became the raw material from which nineteenth-century authors assembled the Black Mass. The wider setting is described in The European Witch Trials.

The Affair of the Poisons and the Abbé Guibourg§

The one early modern episode that most historians accept as involving real, if murky, sacrilegious masses is the Affair of the Poisons in Paris. Beginning in 1677, police investigations under the lieutenant-general Gabriel Nicolas de La Reynie uncovered a network of fortune-tellers, abortionists and poison-sellers serving clients at every social level. A special court, the chambre ardente, sat from 1679 to 1682, examining hundreds of suspects and sentencing dozens to death or exile.

The central figure was Catherine Monvoisin, known as La Voisin, a diviner and midwife burned at the stake in February 1680. After her execution, her daughter Marguerite and others gave testimony implicating Madame de Montespan, the king's mistress, who was said to have sought love charms to keep Louis XIV's affection. The most notorious statements concerned the elderly priest Étienne Guibourg, who was alleged to have celebrated masses over the body of a woman serving as an altar, accompanied by gravely criminal acts against infants. Guibourg was imprisoned and died in custody in 1686.

How much of this testimony was true remains contested. Much of it was given by prisoners under threat of torture who had reasons to implicate powerful people, and Louis XIV ordered the most sensitive records sealed and later burned some of them; La Reynie's notes survived. Anne Somerset's study concludes that some sacrilegious rites probably took place, while the claims against Montespan cannot be proved. Whatever the truth, the affair gave later writers a documented precedent that they embroidered freely.

Michelet, Huysmans and the Literary Black Mass§

The modern Black Mass was largely invented in nineteenth-century France. The historian Jules Michelet, in La Sorcière (1862), imagined the medieval sabbath as a peasant protest against Church and lords, with a priestess officiating at a "Black Mass" that celebrated nature and freedom. Michelet's vision was romantic rather than documentary, but it gave the rite a name, a structure and a sympathetic, rebellious meaning.

Joris-Karl Huysmans then supplied its decadent form. His novel Là-bas (1891) follows a writer researching the life of Gilles de Rais who is led by his mistress to a Black Mass celebrated by the corrupt Canon Docre in a Paris chapel. Huysmans drew on contemporary rumours and on his contacts with Joseph-Antoine Boullan, a defrocked priest whose circle in Lyon was at the centre of a "magical war" with the Rosicrucian occultists Stanislas de Guaita and Joséphin Péladan, as told in French Occultism from Lévi to Papus. Huysmans hinted that such rites were really performed in Paris, but no reliable evidence has ever confirmed the scene he described.

The success of Là-bas, followed by Léo Taxil's fabricated revelations of Satanic Freemasonry discussed in Léo Taxil and the Palladium Hoax, fixed the Black Mass in the popular imagination. It passed into Symbolist literature, into the Polish writer Stanisław Przybyszewski's The Synagogue of Satan (1897), and later into pulp fiction and cinema. Rumours that the eighteenth-century Hellfire Clubs in England had celebrated Black Masses also grew in this period, though the surviving evidence points mainly to irreverent parody and convivial excess.

The Black Mass in Modern Satanism§

When Anton LaVey founded the Church of Satan in San Francisco in 1966, he used the Black Mass as a recognisable symbol of blasphemy. In The Satanic Bible (1969) he argued that the traditional rite had been mostly a creation of the Church's enemies and its inquisitors, and that a modern Satanist's ritual should serve as psychodrama: a cathartic release from the guilt instilled by Christianity. The Satanic Rituals (1972) included a French-language "Messe Noire" in his own reconstruction, alongside other ceremonies.

For LaVeyan Satanists, as explained in LaVeyan Satanism and the Church of Satan, the Black Mass is an occasional theatrical performance rather than a regular act of worship, and its value lies in breaking taboos that the participant still feels. Many later Satanists regard it as dated, since a parody depends on an audience that takes the original seriously. Some theistic Satanist groups, by contrast, have staged Black Masses as devotional acts directed to Satan.

Controversies and the Question of Sacrilege§

Public Black Masses in the twenty-first century have provoked repeated conflict. In 2014 a cultural club at the Harvard Extension School planned a "re-enactment" with members of The Satanic Temple, promising that no consecrated host would be used; after protests from Catholics and a eucharistic procession led by the archbishop of Boston, the event moved off campus and was much reduced. The same year a small group held a Black Mass at the Oklahoma City Civic Center amid protests; a lawsuit by the Archdiocese of Oklahoma City ended when the organiser handed over a consecrated host he claimed to possess.

For Catholics the central issue is the Eucharist, believed to be the real presence of Christ. The Code of Canon Law treats throwing away, taking or retaining the consecrated species for a sacrilegious purpose as one of the gravest offences, carrying automatic excommunication. Satanists, for their part, often defend public performances as protected religious expression or as satire of religious privilege. The Black Mass thus continues the pattern it has followed for centuries: a ritual whose meaning lies as much in the reactions it provokes as in anything performed at the altar.

Frequently asked questions§

Is the Black Mass a real historical ritual?§

Mostly not before the late seventeenth century. Medieval and witch-trial accounts were accusations shaped by learned demonology and coerced confessions. The Affair of the Poisons (1677–1682) offers the best evidence for real sacrilegious masses, and modern Satanists have performed their own versions since the 1960s.

Who was the Abbé Guibourg?§

Étienne Guibourg was a French priest accused during the Affair of the Poisons of celebrating sacrilegious masses for clients of the diviner La Voisin, allegedly including Madame de Montespan. He was imprisoned without public trial and died in custody in 1686.

Do Satanists perform the Black Mass today?§

Some do, though rarely. The Church of Satan treats it as an optional psychodrama, while some theistic groups stage it as worship. Most modern Satanists consider it a historical curiosity and place more emphasis on other rituals or on activism.

What is the Black Mass in Huysmans' Là-bas?§

It is the climactic scene of the 1891 novel, in which the fictional Canon Docre celebrates a Satanic mass in Paris. Huysmans drew on rumour and occult gossip, and his description became the model for most later images of the rite.

Sources and further reading§

• Satanism: A Social History — Massimo Introvigne, 2016
• Children of Lucifer: The Origins of Modern Religious Satanism — Ruben van Luijk, 2016
• The Affair of the Poisons: Murder, Infanticide and Satanism at the Court of Louis XIV — Anne Somerset, 2003
• Là-Bas (Down There) — Joris-Karl Huysmans, 1891
• Satanism and Witchcraft: A Study in Medieval Superstition — Jules Michelet, 1862
• Europe's Inner Demons — Norman Cohn, 1975
• Witchcraft in the Middle Ages — Jeffrey Burton Russell, 1972
• The Satanic Rituals — Anton Szandor LaVey, 1972