Great Wall of China Great Wall of China The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are collectively referred to as the Great Wall. Especially famous is the wall built in 220–206
History of the Great Wall of China were reassigned to manage the Ji–Chang Defense Commands and step up the defences of the capital region. Under their ambitious and energetic management, 1200 brick watchtowers were built along the Great Wall from 1569 to 1571. These included the first large-scale use of hollow watchtowers on the Wall: up until this point, most previous towers along the Great Wall had been solid, with a small hut on top for a sentry to take shelter from the elements and Mongol arrows; the Ji–Chang towers built from 1569 onwards were hollow brick structures, allowing soldiers interior space to live, store food and