The Château's chapel, dedicated to Saint Louis, whose statue by Marqueste dominates the exterior façade, was constructed in 1882 by the architect Honoré Daumet at the request of the Duc d'Aumale, more or less on the same spot where the old chapel stood before the Revolution. The architect was inspired by the chapel in the Château d'Ecouen, which was constructed by Jean Bullant in the 16th century for Le Connétable, Anne de Montmorency, and from which it has taken numerous vestiges, such as the altar (attributed to the sculptor Jean Goujon), the marquetry panelling and the two stained glass windows. These facing windows, which date from 1544, represent (on the left) the son of Le Connétable Anne de Montmorency protected by Saint John, and (on the right) the daughters of Le Connétable and his wife Madeleine de Savoie, protected by Saint Agatha.