In the first episode of his series tracing the story of the most famous trade route in history, Dr Sam Willis starts in Venice and explores how its Renaissance architecture and art has been shaped by the east and by thousands of exchanges along the Silk Road. From Venice Sam travels to China's ancient capital, Xian. Here, Sam's story takes him back in time to reveal the tale of an emperor who was so desperate for horses to help protect his borders that he struck one of the most significant trade deals in human history - he wanted war horses, he gave the most precious ...