Trade Fair Palace

When the Trade Fair Palace opened in Prague in 1928, it was one of the largest functionalist buildings in the world, a vast hall of concrete, glass and light built for commercial fairs. Le Corbusier, visiting, is said to have been both impressed and unsettled by its sheer scale. After a fire gutted it in 1974, it was rebuilt to house the National Gallery's modern art.

Behind that severe façade is the best of Czech modern painting and a remarkable stock of French art bought early by the young Czechoslovak state, with Picasso given a room of his own and works by Monet, Renoir, Klimt and van Gogh. Rodin and Munch appear too.

The seven floors climb around a huge central atrium, and the building itself, all daylight and clean lines, is treated as the first exhibit you walk into.