Jade cup that belonged to one of the great leaders of the Timurid Empire. Neil MacGregor, Director of the British Museum, tells the story of a cup once owned by Ulugh Beg, who built the great observatory in Samakand and has a crater on the moon named after him. Neil explores the story of the Timurids in Central Asia and the influences that spread along the Silk Road at this time. (Duration: 14 mins)