The Great Wall of China
The successive walls, towers, and fortifications built across northern China over two millennia to guard the frontier against steppe incursions, culminating in the Ming dynasty's 8,850-kilometer stone-and-brick barrier that became a global symbol of China.
Timeline
The First Walls of the Warring States
Rival Chinese states began raising long earthen walls during the Spring and Autumn and Warring States periods. The state of Qi built one of the earliest recorded walls in the 7th century BC, and Chu's "Square Wall" (c. 656 BC) is often cited as the first. These walls defended against both nomadic riders and neighboring states.
Location: China
Qin Shi Huang Links the Northern Walls
After unifying China in 221 BC, the First Emperor ordered general Meng Tian to connect and extend existing state walls into a single frontier system, reportedly conscripting hundreds of thousands of laborers, many of whom died during construction. Early Western writers later conflated this wall with the visible Ming-era wall, but the Qin structure was mostly rammed earth.
Location: Northern China
The Han Dynasty Extends the Frontier
The Han dynasty extended the wall far west along the Hexi Corridor with watchtowers and beacon lines, protecting caravans on the early Silk Road and anchoring garrisons in the Tarim Basin. Han-era walls also regulated trade at frontier gates where nomads exchanged horses for silk and grain.
Location: Hexi Corridor, Gansu, China
Northern Qi and Sui Build Anew
The Northern Qi dynasty constructed more than 1,600 kilometers of wall in the 550s, and the Sui dynasty (581-618) continued massive wall-building campaigns against Turkic peoples. These efforts again drew on conscripted labor, and later dynasties such as the Tang relied more on diplomacy and military campaigns than on fixed walls.
Location: Northern China
The Ming Building Program Begins
After expelling the Mongol-led Yuan dynasty in 1368, the Ming began an almost unbroken 270-year program of frontier wall construction. Stated aims were to prevent Mongol raids and to control movement and trade across the border. The Ming wall eventually ran roughly 8,850 kilometers from Jiayuguan in the west to Shanhai Pass on the Bohai Sea.
Location: Beijing, China
The Tumu Crisis Accelerates Fortification
In 1449 a Mongol army defeated Ming forces at Tumu and captured the Yingzong Emperor. The shock ended the Ming's forward strategy in the steppe and shifted policy toward static frontier defense, with successive emperors pouring resources into massive walls, garrisons, and beacon towers along the northern line.
Location: Tumu, Hebei, China
The Wall Rebuilt in Brick and Stone
From the 1560s-1580s, general Qi Jiguang and the Jizhou garrison command rebuilt sections near Beijing in fired brick and stone, adding the two-story hollow watchtowers that define the wall's modern appearance at Badaling, Mutianyu, and Jinshanling. These towers housed troops, stored weapons, and served as fighting platforms.
Location: Jizhou, Hebei, China
The Wall's Military Role Ends
In 1644 Ming general Wu Sangui opened the gates at Shanhai Pass to Manchu forces, who entered and went on to establish the Qing dynasty. With the Qing ruling both China and the Mongol steppe, the wall lost its frontier purpose and fell into disuse, its bricks quarried by local villages over the centuries.
Location: Shanhai Pass, Hebei, China
UNESCO World Heritage Inscription
UNESCO inscribed the Great Wall as a World Heritage Site in 1987, and a 2012 state survey measured the full multi-dynasty wall system at 21,196 kilometers. By then the wall had become China's premier national monument, even as studies found substantial portions of the Ming wall eroded or destroyed.
Location: China