Exhibition of the week

A Call to Art

If you feel you need to see another exhibition about William Morris and the pre-Raphaelites, get yourself to Cambridge for this exploration of late Victorian art and politics.

Fitzwilliam Museum, Cambridge, until 3 May

Also showing

The Night Journal

Aisling O’Beirn, Wilhelmina Peace and more meditate on the night: what does it mean when the world goes dark? One for Halloween maybe.

CCA Derry until 19 December

Robert Rauschenberg

A special display from the Artist Rooms collection of the great magician of found stuff, with an emphasis on his later work – was it a falling off, or seriously underrated?

Tate Modern, London

Móti Collective

A collective of no fewer than 17 artists and designers who work in Orkney celebrates their 10th anniversary in a gallery evocatively placed on Stromness harbour.

Pier Arts Centre, Stromness, until 24 December

Wilhelmina Barns-Graham

The Cornish landscape becomes a bony but ethereal abstraction in this modernist painter’s…