English translation of '长城'

As one of the longest man-made mega structures in the world, the Great Wall of Chinais nearly 4,000 miles in length, reaching from the border of Xinjiang province inthe west to the eastern coast just north of Beijing. It is probably the most famousof China's landmarks, and was made a UNESCO World Heritage site in 1987. There arerecords of fortifications being built along the route which date from the 3rd centuryBC, although most of what remains today was built during the Ming dynasty (1368-1644).Built as a defence mechanism, its primary function was to withstand invasions by thenorthern tribes.