Catherine Monvoisin, aka La Voisin was a thriving entrepreneur/sorceress in 17th century France. She provided cosmetics, potions, charms, demonic rituals, and midwifery services to people of all classes. But one of her clients was the King’s mistress and they both got caught up in a witch hunt scenario called The Affair Of The Poisons. 
References: 
The Affair of the Poisons: Murder, Infanticide & Satanism at the court of Louis XIV by Anne Somerset
Strange Revelations: Magic, poison and sacrilege in Louis XIV’s France by Lynn Wood Mollenauer
https://www.syfy.com/syfywire/la-voisin-frances-murderous-fortune-teller
https://historyofyesterday.com/the-affair-of-the-poisons-cf31804b3e0
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