With their latest disturbing shows, are the Chapman brothers asking profound questions about evil, or just fooling around?

A gothic, moody setting and serious scholarship reinstate the religion into the National Gallery’s early Renaissance altarpieces

Think you know all about impressionism and its chocolate-box image? Think again. The movement was revolutionary

How did the Tate turn the theft of two Turners into a financial and political victory for the gallery? Meet the man who negotiated their return

There’s loads of gold and gorgeousness, but scholarly scruples have gone astray in the British Museum’s latest show