At the new National Portrait Gallery
The abstract art of Ellsworth Kelly
A Futurist family home in Rome
The ageing of Helsinki’s modern architecture
Plus: Gertrude Jekyll’s garden at Munstead Wood, X. Marcel Boulestin’s catering to the masses, reviews of Cecily Brown in New York and Simone Leigh in Boston and a preview of Parcours des Mondes
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