• Getting ruff and ready with Frans Hals
• Sophie Calle takes on Picasso
• Can museums cope without dodgy donors?
Michelangelo | Musée des Arts Décoratifs | Sarah Lucas
National Portrait Gallery | Ellsworth Kelly | Casa Balla in Rome
Video art | Richard Avedon | Ragnar Kjartansson
Roy Lichtenstein | Jaune Quick-to-See Smith | Walter Hopps
A crowded display sees some 150 works of Abstract Expressionism clamouring for attention, but perhaps this is the point
Six leading figures in the art world discuss the challenges of collecting and showing video art
The Palais de Danse in St Ives allowed the sculptor’s work to grow in ambition
The Asian Art Museum is reviving interest in a painter who was at the heart of San Francisco’s arts scene in her lifetime, but all too quickly forgotten after her death