Head of Augustus, the first Roman emperor. Neil MacGregor, Director of the British Museum, looks at one of the world's most famous rulers, whose powerful, God-like status is brilliantly enshrined in a 2000-year-old bronze head with striking eyes. He explores how Augustus dramatically enlarged the Roman Empire, establishing his image as one of its most familiar objects. The historian Susan Walker and the Mayor of London, Boris Johnson, help explain the power and methodology of Augustus. (Duration: 15 mins)