A selection of some of the world's great paintings that have enchanted, puzzled or disturbed. This week's theme: Cities Macke (1887-1914)
The Hat Shop, at the Folkwang Museum, Essen, in which August Macke, the young German artist killed in the First World War, transforms an ordinary shop window into a poetic view of city life. Written and presented by John Jacob
Series adviser EDWIN MULLINS * Director BILL MORTON