After the (non-)scandal of (un-)banned Tube posters, the works of Lucas Cranach the Elder are now well and truly on show at the Royal Academy. Painter, print-maker, illustrator, businessman, propagandist, and huge fan of the female nude, this is Cranach's first major exhibition in Britain. And while you're gazing at all the nakedness, remember; this was a mate of Martin Luther, and those erotic female nudes are all about Protestant devotion. Honest. Openings Ahoy!......