Tate Modern gets itself in a terrible tangle over a cancelled show

Selling the Royal Academy’s greatest treasure would be risky and morally wrong

Luciano Garbati’s new work expresses a widespread decline in symbolic literacy

Works by Michelangelo, Velázquez, Rodin, Rothko and Mondrian have all been vandalised for reasons of mental instability or political activism or both, informs Michael Prodger

Among the Trees, Hayward Gallery (until 31 October)

Practically all the artists in the book are traumatised in one way or another, and all experienced war

Raphael, as dedicated a lover as he was a painter, died at 37 at the height of his powers and fame, illustrates Michael Prodger

MacDonald Gill’s poster for the Empire Marketing Board helped promote a nation at the height of its powers

The National Gallery is putting women artists centre stage

A brilliant, ambitious volume of art history — but physically difficult to read