The forgotten city of the Ming dynasty

In east-central China, archaeologists are hard at work. The ancient imperial city of Fengyang, rediscovered by chance over 50 years ago, has never been excavated. Initial excavations reveal a gigantic city, even more imposing than Beijing's famous Imperial City. What did it look like? When and how was it built, and why was it destroyed? Researchers delve into the heart of these mysteries to unlock the secrets of this forgotten city, witness to a lost imperial past.