The Black Masses of the Abbé Guibourg & La Voisin
DISCLAIMER: The witch-cult hypothesis has been discredited. An extract from Murray—an eminent Frazerian—is here presented because of its importance to the mythology of Modern Pagan Witchcraft, as well as for its enduring value as a creative work.
“THE ABBÉ GUIBOURG (1679), head of the Paris witches, 'performed a conjuration at Voisin's house, dressed in alb, stole and maniple.' [1] The same Abbé celebrated mass more than once over the body of a woman and with the blood of a child, sacrificed for the occasion, in the chalice (see section on Sacrifice). The woman, who served as the altar for these masses, was always nude, and was the person for whose benefit the ceremony was performed. Marguerite Montvoisin [daughter of La Voisin] makes this clear:
“‘It is also true that a midwife who lived at the corner of Rue des Deux-Portes also distilled the entrails of a child whose mother had given birth there…. Before the distillation, the entrails of the child and the mother's afterbirth had been taken to Saint-Denis, to Guibourg, by his mother, the midwife and the child's mother, on whose belly his mother, upon her return, told him that Guibourg had said mass.' [2]
The Abbé Guiborg (center) sacrifices an infant over Louis XIV's mistress, Madame de Montespan (lying on the table), whose naked body serves as the altar for the Black Mass. To the left of the Abbé is La Voisin, his attendant, who was later to be implicated in the "Affair of the Poisons."
(Source: Henry de Malvost, Public Domain, via Wikimedia Commons)
“Guibourg acknowledged that, besides the one just quoted, he celebrated three masses in this way. At the first he used a conjuration. 'He said the second mass in a hovel on the ramparts of Saint-Denis, for the same woman, with the same ceremonies. . . . He said the third in Paris at Voisin's for the same woman.' [3] The woman mentioned in Guibourg's confession was Madame de Montespan herself. The following conjuration was used at the first mass[:]
“‘on behalf of the lady who lay exposed before him': 'Astaroth, Asmodée, princes of friendship, I beg you to accept the sacrifice which I offer in return for the things which I ask of you, which are: the affection of the King and Monseigneur the Dauphin; to be honoured by the princes and princesses of the court, and that nothing which I ask of the King is denied me, or my relatives and servants....’ [4]
Astaroth.
(Source: M. Maleuvre, 1832, Public Domain, via Wikimedia Commons)
Asmodeus.
(Source: Francis Barrett, R. Griffith, Public Domain, via Wikimedia Commons)
“The whole ceremony was performed to the end that the love of Louis XIV should return to Madame de Montespan, at that time his discarded mistress; it seems to be a kind of fertility rite, hence its use on this occasion. The Abbé Guibourg was the sacrificing priest, and from this and other indications he appears to have been the Chief or Grand-master who, before a less educated tribunal, would have been called the Devil. Both he and the girl Montvoisin were practically agreed as to the rite; though from the girl's words it would appear that the child was already dead, while Guibourg's evidence implies that it was alive. Both witnesses gave their evidence soberly and gravely and without torture.
Madame de Montespan.
(Source: Workshop of Pierre Mignard I, Public Domain, via Wikimedia Commons)
"Montvoisin, who was eighteen years old, stated that she had presented 'at the mass of Madame de Montespan, by order of her mother, an apparently premature infant, placed in a basin, which Guibourg slaughtered, poured into the chalice, and consecrated the blood with the host.' Guibourg's evidence shows that the sacrifice was so far from being uncommon that the assistants were well used to the work, and did all that was required with the utmost celerity:
"‘He had purchased for a crown an infant who was sacrificed at this mass, presented to him by a grande fille; and having the blood of the infant whom he stabbed in the throat with a pen-knife, he poured it into the chalice, after which the infant was taken away and to another place in order to have its heart and entrails extracted, which were then brought back to [Guiborg] to make a second oblation.' [5]
—M. A. Murray, The Witch-cult in Western Europe (1921, pp. 150-151; 156-157)
Another depiction of the Black Mass.
(Source: Anon., Public Domain, via Wikimedia Commons)
Note on the Notes: Murray of course presents the original French text of the depositions of Marguerite Montvoisin and the Abbé Guiborg, which I have been able to replace here in part with an English translation found in Anne Somerset, The Affair of the Poisons: Murder, Infanticide, and Satanism at the Court of Louis XIV (Kindle Ed., St. Martin’s Press, 2004), ch. ix., p. 271 (see para. 4 of this post). Elsewhere I have unfortunately had to fill in the blanks with Google Translate.
[1] François Ravaisson, Archives de la Bastille (Paris, 1873), vi. (1679-81), p. 336.
[2] Murray’s footnote: “Id., p. 333.”
[3] Murray’s footnote: “Id., p. 335.”
[4] Id., p. 335.
[5] Id., p. 334, 335.












