Michelangelo's friend and Canada's punk conceptualist – the week in art

The ambition of Renaissance Rome, Rodney Graham paddling into Gateshead, revolutionary Russian architecture and South African sensuality – all in your weekly art dispatch

Michelangelo and Sebastiano
A fascinating closeup on Michelangelo’s genius in the years when he competed with Raphael and collaborated with his friend Sebastiano del Piombo in the intensely ambitious atmosphere of High Renaissance Rome.
• National Gallery, London, 15 March-25 June

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