This monastery, which dates from the 14th and 15th centuries, exhibits the town's largest selection of medieval sculptures (Romanesques and Gothic) and paintings. The collection contains works from the Italian, Flemish and Dutch schools including pieces by Rubens and Le Perugin and French artists from the 16th-20th centuries (Toulouse-Lautrec, Manet, etc.). The monastery itself has a chapel with two beautiful cloisters as well as a unique collection of Romanesque capitals. The museum also organizes guided tours and lectures. Admission prices vary but average around EUR5.