Built between the 13C and 17C, this building is remarkable both for its dimensions and the beauty of its nave. The elaborate 16C façade features a beautiful Flamboyant-style rose window and a series of stained-glass windows. The interior gives the impression of power and gracefulness. The superb stained-glass reveals the evolution in techniques from the 13C to the 16C. In the treasury, admire an ivory casket and the 9C psalter of Count Henri.