Cupid’s dazzling arrival, Bridget Riley’s rollercoaster and a dual of two masters – the week in art

Caravaggio’s masterpiece hits the UK, Margate goes dotty for Riley, and it’s paintbrushes at dawn for Turner and Constable – all in your weekly dispatch Caravaggio’s Cupid The shock of the old hits London as Caravaggio’s most confrontational and mind-boggling masterpiece goes on free display. (…)