The Great Wall of China is mankind’s ultimate creation, but it is far more than bricks and mortar. Built across the historical northern borders of China, one of its main purposes was to protect and consolidate territories of Chinese states and empires against various nomadic groups

It has guarded its secrets for over 2,800 years – no one knows how long it is, who built it, or why it evolved. Using technology and cutting edge science, the length of the wall is measured, the building materials analysed providing fascinating insights into the world’s longest wall.

Episode Length: 00:51:00

Year: 2014

Episode: 1

This documentary is available to watch for FREE on Planet Knowledge, a free to watch video on demand channel on Freeview HD (Channel 265), Youview, Samsung connected TV’s, selected smart tv’s, tablets and smartphones using Android or iOS.