The exterior of this massive neoclassical palace (1732–42) by architect Robert de Cotte may be austere, but there's plenty of glamour inside. Decorator Robert le Lorrain's magnificent ground-floor rooms include the great Salon d'Assemblée (Assembly Room) and the book- and tapestry-lined Bibliothèque des Cardinaux (Cardinals' Library). The library leads to a series of less august rooms that house the Musée des Arts Décoratifs (Decorative Arts Museum) and its elaborate display of ceramics. This is a comprehensive presentation of works by Hannong, a porcelain manufacturer active in Strasbourg from 1721 to 1782; dinner services by other local kilns reveal the influence of Chinese porcelain. The Musée des Beaux-Arts (Fine Arts Museum), also in the château, includes masterworks of European painting from Giotto and Memling to El Greco, Rubens, and Goya. Downstairs, the Musée Archéologique (Archaeology Museum) displays regional finds, including gorgeous Merovingian treasures.