The top art exhibitions in Europe and the US this summer
Saint Francis of Assisi (National Gallery, London) ‘The Wolf of Gubbio’ (1877) by Luc Olivier Merson © Agence Photo de la RMN-GP This summer, the National Gallery celebrates the medieval Italian mystic — an enduring figure in art history whose asceticism, spirituality and love of nature have proved inspirational to artists from Botticelli and Caravaggio