Marie Delphine Lalaurie (née Macarty or Maccarthy, c. 1775 – c. 1842), more commonly known as Madame LaLaurie, was a Louisiana-born socialite and serial killer known for the torture and murder of slaves.
Born in New Orleans, Lalaurie married three times over the course of her life. She maintained a prominent position in the social circles of New Orleans until April 10, 1834, when rescuers responding to a fire at her Royal Street mansion discovered bound slaves in her attic who showed evidence of torture over a long period. Delphine was tricked by the voodoo priestess Marie Laveau into drinking a potion of eternal life and then buried alive for centuries. That is, until she was discovered and brought to Miss Robichaux’s Academy and used as leverage against Marie Leveau.
The Royal Street mansion where Lalaurie lived is a prominent New Orleans landmark in which ghost tours are often held.