• The painters who invented Norway
• An interview with Jenny Holzer
• Jean Dubuffet’s collection of Art Brut
• What can neuroscience tell us about art?
Plus: Gillian Darley on the Naples metro, Alice Spawls on Dorothea Tanning and Harriet Baker on Balthus
What happens when an artist wants to be anonymous?
An Austrian museum is hosting a show by an unnamed artist – but perhaps this act of secrecy will help us see the work more clearly