It is an imprecise science to take the pulse of the art world from the exhibition schedules, but on a rough reading 2015 – with its blockbuster shows of Marlene Dumas, Carsten Höller and Ai Weiwei – marched to a contemporary beat. The pace of this year’s programme feels more sedate, with plenty to offer lovers of traditional media, antiquities and overlooked geniuses. Botticelli Reimagined (Victoria and Albert Museum, London, 5 March-3 July)We British like to claim ownership over Botticelli, since it was largely thanks to John Ruskin and the Pre-Raphaelites that he was rediscovered after three centuries of neglect. The V&A takes its cue for this exhibition from the beautiful portrait of Smeralda Bandinelli bought for £20 from Christie’s in