In Our Time

Melvyn Bragg and guests discuss the Great Wall of China.The Great Wall is not a single Wall. It is not visible from space, contrary to popular belief, as it is much too thin. But it remains a spectacular architectural and historical phenomenon.The Great Wall's military importance, and its symbolic power, have varied widely in its long existence, as its place in Chinese life has shifted with the country's history. It was initially constructed at the command of the first Emperor, from 221 BC, and was a combination of the various protective walls that had been built by the smaller states which he had conquered and merged to form China. The original Wall was made of pounded earth, and in places the wind-carved remains of this two thousand year old construction are still visible. But the Wall which is familiar to us today is the work of the Ming Dynasty, and its vast programme of reinforcement - prompted by a renewed threat from the Mongols in the north. In the 17th century, amazed Jesuits sent back reports to Eur