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Disasters of War

Imperial War Museum

Three ages of European war (left) through the etchings of Jacques Callot, Goya and Otto Dix. Black-and-white flashes of horror, mass executions, madness and blood everywhere. To 26 Sept

Chuck Close Hayward Gallery

The original painter of the very big face, analysed into pixel fragments. Work from the photorealism of the 1960s to the current tesselated, bright-candied images. To 19 Sept

Morandi & His Time Estorick Collection

Nineteen of his table-top paintings, with their close and nervous families of bottles, jugs and pots - plus work by contemporaries. To 19 Sept

Francesca Woodman/Hellen van Meene Photographers' Gallery

Portraits of young women absorbed. Woodman, who died at 22, presented herself, van Meene does her friends - young, rural and Dutch. To 25 Sept

Joseph Beuys - The Secret Block

Royal Academy

A collection of 456 beautiful and mysterious drawings using blood, fat, pencil and gold leaf offer clues to Beuys's mythology. To 16 Sept