structural:expansion, structural:summarization
Mosan art, painting, architecture

Mosan art is a regional style of Romanesque art from the Meuse river valley in present-day Wallonia, and the Rhineland, with manuscript illumination, metalwork, and enamel work from the 11th, 12th and 13th centuries. Among them is the masterpiece of Renier de Huy and perhaps of the whole Mosan art Baptismal font at St Bartholomew's Church, Liège. The architecture of Roman churches of Wallonia are also named mosan, exemplified by the Collegiate Church of Saint Gertrude in Nivelles, and the churches of Waha and Hastière, Dinant. The Ornamental brassware is also a part of the Mosan art and among these dinandiers Hugo d'Oignies and Nicholas of Verdun. Jacques du Broeucq was a sculptor of the 16th century.

Flemish art was not confined to the boundaries of modern Flanders and several leading artists came from or worked in areas in which langues d'oïl were spoken, from the region of modern Wallonia, e.g. Robert Campin, Rogier van der Weyden (Rogier de la Pasture) and Jacques Daret. Joachim Patinir Henri Blès are generally called mosan painters. Lambert Lombard (Liège, 1505 – 1566) was a Renaissance painter, architect and theorist for the Prince-Bishopric of Liège. Gérard de Lairesse, Bertholet Flemalle were also important painters in the Prince-Bishopric of Liège.

Gustave Serrurier-Bovy (Liège, 1858 – Antwerp, 1910) architect and furniture designer, credited (along with Paul Hankar, Victor Horta and Henry van de Velde) with creating the Art Nouveau style, coined as a style in Paris by Bing.

George Grard (1901—1984) was a Walloon sculptor, known above all for his representations of the female, in the manner of Pierre Renoir and Aristide Maillol, modelled in clay or plaster, and cast in bronze.

During the 19th and 20th centuries many original romantic, expressionist and surrealist Wallon painters emerged, including Félicien Rops, Paul Delvaux, Pierre Paulus, Fernand Verhaegen, Antoine Wiertz, René Magritte... The avant-garde CoBrA movement appeared in the 1950s.