In the 1600s, there was no such thing as divorce. If you married badly, you were stuck in that marriage.
But sometimes a matrimonial mess needs to be fixed. Permanently.
Giulia Tofana saw firsthand the horrors of bad marriages and the cruelties therein.
There was a way to free oneself, but it was only for the wives in the very worst of relationships. It was a secret and it was used to kill hundreds of 'bad' husbands.