Arguably the most powerful painting about war ever achieved. It portrays the slaughter of civilians after Napoleonic troops entered Madrid in 1808. The programme reveals the historical truths behind the painting and shows exactly how Goya achieved this masterpiece of protest.

Perhaps the most celebrated of all Japanese pictures, the Great Wave's portrayal of a huge wave about to overwhelm three boats was only produced by Hokusai when he was old and broke and needed money badly. A print that cost little more than bowl of noodles to those who first bought it, the image has been hugely influential on later art.