Dada

When Max Ernst was asked by an American artist to define surrealism at a New York gathering of exiles in the early 1940s, he pointed across the room at André Breton and said: ‘That is surrealism.’ Even today it can seem as if no other answer is available, so tenacious was his grip. A former student of neurology and psychiatry, with no qualifications other than an instinct for the coming thing (‘an astute detector of the unwonted in all its forms’, as he later described his fellow conspirator Louis Aragon), Breton encountered the early writings of Freud as a medical orderly on a trauma ward, during the first world war,

Great Swiss artists, like famous Belgians, might seem to be an amusingly underpopulated category. Actually, as with celebrated Flemings and Walloons, when you start counting you discover there are more of them than you thought. Paul Klee, for example, and Alberto Giacometti. A third, whose work is reassessed in a large exhibition at Tate Modern, was Sophie Taeuber-Arp. Clearly, unlike the other two, hers is far from being a household name even in fairly artistic homes. There are several reasons for this, one perhaps being the unwieldiness of that cognomen itself. She was born Sophie Henriette Gertrud Taeuber in 1889 at Davos, and as was then the custom, hyphenated her