Oldmasters Museum

If you want Pieter Bruegel the Elder, this is one of the places to come. The Oldmasters Museum, the historic core of Belgium's royal fine-art museums in Brussels, holds several of his paintings, among them the swarming Fall of the Rebel Angels, full of hybrid monsters tumbling out of heaven, and the snow-covered Census at Bethlehem, where the Holy Family is lost in an ordinary Flemish winter crowd.

The collection reaches back before him to the Flemish Primitives, Rogier van der Weyden, Robert Campin and Bosch, and forward through Rubens and Van Dyck into the Baroque.

Its single most famous picture is French and much later: Jacques-Louis David's Death of Marat, painted in 1793, showing the murdered revolutionary slumped in his bath. David spent his last years in exile in Brussels, which is how his best-known work came to hang here rather than in Paris.