The Great Wall of China

"The Great Wall of China was built to stop intruders from invading the country. Construction began more than 2,000 years ago. The wall took more than 1,000 years to build. Find out more in The Great Wall of China, a title in the Structural Wonders of the World series. These books identify some of the worlds best-known structures, exploring their history, the people responsible for their creation, and the science behind their construction."--Provided by publisher.