Persian power, Pinochet protests and postwar punks and princes – the week in art

Lion head drinking cup, c500BC-470BC, attributed to the Athenian Douris, showing in Luxury and Power at the British Museum. Photograph: © The Trustees of the British Museum

Exhibition of the week

Luxury and Power
The struggle for power between ancient Greece and the Persian empire, seen in a radical new light.
• British Museum, London, from 4 May to 13 August.