One night in 1477, a stately castle in France became the site of a double murder. King Louis XI's half sister Charlotte de Valois was married to Jacques de Breze, who learned from a servant one night that his wife was in bed with another man upstairs. De Breze ran upstairs and killed both lovers with a sword, choosing to wear green (his late wife's favourite colour) to the funeral instead of black. Since then, visitors have reported catching a sight of a "Green Lady" haunting the halls in her signature colour.