Rembrandt, animal magic and the battle of the Somme

The real deal? Self-Portrait, Wearing a Feathered Bonnet (1635), by Rembrandt van Rijn. Photograph: National Trust Images/Chris Titmus

Exhibition of the week

The Somme
The battle whose waste of life has become an image of the futility and madness of war is remembered by 21st-century artists including Jeremy Clark, Helen Grey, Michael Isaac, Lauren Adams and Charlotte Potter.
• Moor House, London, from 11-30 November.

Also showing

Am I Rembrandt?
The authenticity of Rembrandt’s paintings is explored in a small exhibition that focuses on his Self-Portrait, Wearing a Feathered Bonnet (1635) on loan from the National Trust’s Buckland Abbey.
• Dulwich Picture Gallery, London, until 5 March.

Animality
Art has been in love with animals since cave painters portrayed mammoths. A herd of artists including Marcel Broodthaers, Maurizio Cattelan, Roni Horn and Steve McQueen prove this obsession with the natural world still has teeth.
• Marian Goodman Gallery, London, until 17 December.

Rachel MacLean
Surreal kaleidoscopic multimedia meditations on identity from the artist who will represent Scotland at the 2017 Venice Biennale.
• Tate Britain, London, 14 November to 2 April.

The Vanished Reality
Hans Haacke, Maria Loboda, Darcy Lange, Kerry James Marshall and more use art to uncover the nature of power.
• Modern Art Oxford, until 31 December.

Masterpiece of the week

St John on the Island of Patmos, by Diego Velazquez

Revelation and reality are disturbingly combined in this masterpiece about the end of the world. Saint John, a humble peasant portrayed from life, looks up as he writes the Book of Revelation, the part of the Bible that predicts the last days. An eerie glowing vision reveals the heavenly source of his information. The world is so solid and ordinary in this painting – but John’s vision claims it will all end with the coming of Antichrist.
• National Gallery, London.