Secret History - Season 17 - Eps 3: Secrets of China's Forbidden City
The world's largest palace, the Forbidden City, stands at the heart of Chinese history, as the home to the emperors for 600 years. And it's full of secrets. This documentary goes behind closed doors to explore this extraordinary palace-city and to discover the clues to its creation. Unique access to the latest conservation works uncovers evidence hidden in locked halls and high in the mighty roofs, revealing a ruler who governed by fear but also created an exquisite and enormous work of art and technology.
About Secret History

Title: Secret History
First Air Date: 1991-11-14
Last Air Date: 2017-11-12
Status: Returning Series
Rating: 7/10 (from 1 votes)
Language: EN
Seasons: 18
Total Episodes: 117
Network: Channel 4
Genres: Documentary
Production Companies: 3BM Television
Synopsis
Secret History was a long-running British television documentary series. Shown on Channel 4, the Secret History brandname was used as a banner title in the UK, but many of the individual documentaries can still be found on US cable channels without the branding. It can be seen as Channel 4's answer to the BBC's Timewatch.