Changes

== External links ==

== External links ==

*[http://www.thegreatwall.com.cn/en/ The Great Wall]

*[http://www.thegreatwall.com.cn/en/ The Great Wall]

*[http://www.britannica.com/eb/article-9037891/Great-Wall-of-China Great Wall of China] Encyclopaedia Britannica.  

*[http://www.britannica.com/eb/article-9037891/Great-Wall-of-China Great Wall of China] Encyclopaedia Britannica.

*[http://encarta.msn.com/encyclopedia_761569621/Great_Wall_(China).html Great Wall (China)] Encarta.

== References ==

== References ==