Witchcraft, death threats and 25 years of Photoshop – the week in art

Goya’s witches, the fall-out from the Tower of London poppy artwork, plus John Terry and text-messaging cows – all in your weekly art dispatch

Goya
Extraordinary drawings of witchcraft by a man of the Enlightenment who was at once fascinated and repelled by popular superstitions.
• Courtauld Gallery, London, from 26 February until 25 May.

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