The 17th-century 'Affair of the Poisons' in the French court

Versailles looked like a golden dream, but it smelled like arsenic and ego. The "Affair of the Poisons" was the ultimate 17th-century side hustle: an underground market where aristocrats bought "inheritance powders" to fast-track their promotions and widowhood.

It spiraled from petty murders into a crisis involving the King’s own mistress and secret black masses. When the police realized half the nobility was buying into the occult poison trade, Louis XIV had to panic-burn the evidence to save his court's face.

Behind every royal portrait is a pile of bodies and a very busy chemist.

Wait, why would the King's mistress need poison if she was already winning?

In the Versailles shark tank, 'the top' was a slippery spot. Madame de Montespan was the reigning favorite, but Louis XIV had a wandering eye. New, younger rivals were constantly appearing, threatening her status and luxury.

She didn't just want to kill rivals; she wanted to keep the King under a literal spell. Those 'black masses' involved 'love potions' made of ingredients like crushed toads and bat blood, meant to ensure Louis stayed obsessed with her.

It was a desperate play for job security. When being replaced meant social exile, she turned to the occult to keep her grip on power.

So what actually happened during one of those 'black masses'?

Think of it as history's most gruesome "spa day." The "altar" wasn't stone—it was the naked body of the noblewoman herself, lying in a dark cellar.

A defrocked priest would perform a ritual over her, sacrificing an infant to harvest "life force." This blood was then mixed into potions meant to bind the King's heart forever.

It was high-octane blasphemy. They believed that by risking their eternal souls, they could force the universe to guarantee their social survival.

Did the King actually end up drinking those gross potions without noticing?

He absolutely did. Since she was the reigning favorite, she had plenty of opportunities to dine with him and ensure those 'love potions' made it into his glass.

The 'ingredients' like blood were ground down and stirred into his heavy sauces or dark wines. The intense spices and rich flavors of 17th-century cooking were perfect for masking the metallic taste of the ritual.

Louis was basically being micro-dosed with a horror show. He didn't die, but he suffered from constant headaches and stomach issues, which the court doctors just blamed on his legendary appetite.

How did a secret this big finally blow up in their faces?

It wasn't a doctor who cracked the case; it was a cop with a very long 'to-do' list. The police arrested a high-end fortune teller named La Voisin, only to discover her client ledger was basically a 'Who’s Who' of the French aristocracy.

Once the interrogation started, the nobility turned on each other faster than you can say 'treason.' The confessions were so scandalous—involving infant sacrifices and royal hit lists—that the King had to create a special secret court just to contain the fallout.

In the end, the truth was so ugly that Louis XIV literally burned the evidence. He realized that if he followed every lead, he’d be left ruling an empty palace.