Born c.1421, Agnès was the daughter of Jean Soreau and Catherine de Maignelais. She is noted for being the first official royal mistress of a French king, but more so as the subject of renown fine art. Many will recognize Fouquet's work depicting her as the Madonna.
She died on 9 February 1450 at Jumièges, Normandy, but her body was exhumed in modern times. Studies show the cause may have been from mercury poisoning.