France’s Black Masses and Quietist Heresy

Catherine La Voisin was executed in 1680 for organizing black masses at the court of **Louis XIV**, ceremonies attended by nobles, including the Marquise de **Montespan**, the king’s mistress. The case was silenced.

The scandal erupted in **1680** when police prefect **Nicolas de la Reynie** dismantled a network of black masses in Paris. At its head was **Catherine La Voisin**, a woman who had turned superstition into a business for the nobility. Among her clients were ladies of the court of **Louis XIV**, including the Marquise de **Montespan**, the king’s favorite between 1667 and 1680.

## Renegade priests and ceremonies to gain favors

The celebrations involved Catholic priests who had abandoned their vows, such as Abbot **Guibourg** (1603-1683). The term “black mass” was coined during this period. Participants invoked the devil to maintain political influence and material advantages. According to trial chronicles, the rites included sensual components.

Rumors circulated about child sacrifices. They were never confirmed. The proceedings ended inconclusively: La Voisin was sentenced to death and executed; Guibourg died in prison. Montespan’s name was excluded from official documents.

## Quietism and black masses in Italy

In the 18th century, the Duchy of **Modena** recorded black masses held in Guasonic circles. The phenomenon was linked to the heterodox margins of quietism, a spiritual current condemned by the Catholic Church. **Miguel de Molinos**, a Spanish priest, was its main proponent and died in prison in **1696** after an inquisitorial trial.

The connection between quietism and occult rituals is not systematically documented. Contemporary sources mix denunciations, rumors, and reality. These accounts should be treated with caution: judicial documentation of the era was partial and conditioned by political interests.