The Golden Room is located on the first floor of the Logis Jean de Laval. It is the only room in the château that has retained its original decor.
Before serving as a residence for the court official, and then as a municipal museum in the late 19th century, upon the arrival of the Germans, the Golden Room was reportedly the site of the assassination of Françoise de Foix.
Legend has it that Françoise de Foix, married to Jean de Laval, Baron of Châteaubriant and Governor of Brittany, had an extramarital affair with François I between 1516 and 1526.
Jealous, Jean de Laval then locked his wife in this room, which was blocked by black curtains and closed shutters, before ordering two barbers to enter her room on the night of October 16-17, 1537, to bleed her wrists and ankles.
Legend also tells that every year on this date, the ghost of the Countess reappears in a pool of blood at the stroke of midnight, then her husband arrives from hell to relieve her feet, until the couple climbs onto the balcony and disappears, only to return the following year.