Regions|Why China's Great Wall is No Longer Being Built

The illustrations in the video were made from the following materials, in order to show the changes of the Great Wall in different dynasties. Map of the Great Wall of China: By Maximilian Dörrbecker (Chumwa) [CC BY-SA 2.5 (http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons Territories of Dynasties in China: Pojanji from wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons