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Great Wall of China

The Great Wall of China is a vast system of Chinese fortifications built over many centuries to defend the northern frontier.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The Great Wall of China is a vast system of Chinese fortifications built over many centuries to defend the northern frontier. It is not a single continuous wall, but a network of walls, trenches, watchtowers, and natural barriers associated especially with the Ming dynasty sections. It is a UNESCO World Heritage Site and is widely regarded as one of the world's most famous landmarks.

History

The fortifications were built over a long period, beginning in the 3rd century BCE and continuing into the 17th century CE. Different Chinese states and dynasties added, rebuilt, and extended sections for defence purposes.

Structure and route

The Great Wall is not one continuous wall. It includes walls, trenches, towers, and natural obstacles, and is commonly associated with the stretch from Shanhaiguan in the east to Jiayuguan in the west.

World Heritage status

UNESCO designated the Great Wall of China as a World Heritage Site in 1987. The inscription recognises its outstanding historical and cultural importance.

Public image and misconceptions

Popular descriptions often simplify the Wall as a single uninterrupted barrier, but historical and archaeological sources describe it as a complex defensive system built in many phases.

Key facts

  • The Great Wall refers to multiple fortifications built, rebuilt, and connected across different periods.
  • Its main purpose was to defend and mark the northern frontier of China.
  • The best-known sections are those built during the Ming dynasty.
  • UNESCO inscribed the site on the World Heritage List in 1987.
  • It is often described as the largest architectural structure ever built by humans in length, area, and mass.
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Canadian context

The Great Wall is a major world heritage landmark studied in Canadian schools, museums, and travel education, and it is a common reference point in global history and cultural geography for Canadian readers.

Frequently asked questions

What is the Great Wall of China?
It is a historic system of Chinese military fortifications built to defend the northern frontier over many centuries.
Is it one wall?
No. It is a network of walls, trenches, towers, and natural barriers built at different times and places.
When was it built?
Construction began in the 3rd century BCE and continued until the 17th century CE.
How long is it?
Modern measurements cited by Chinese heritage authorities put it at more than 20,000 km in total.
Is it a UNESCO World Heritage Site?
Yes. UNESCO listed the Great Wall in 1987.
What is its Chinese name?
Its Chinese name is 长城, romanized as Chángchéng, meaning 'long wall'.

References

  1. UNESCO World Heritage Centrehttps://whc.unesco.org/fr/list/438/
    Supports: World Heritage status, construction period, route, and total length
  2. French Wikipediahttps://fr.wikipedia.org/wiki/Grande_Muraille
    Supports: General description, Chinese name, construction history, route, and revised length
  3. Éduscolhttps://sti.eduscol.education.fr/sites/eduscol.education.fr.sti/files/ressources/pedagogiques/10571/10571-la-grande-muraille-de-chine-plus-de-20-siecles-de-construction-ensps.pdf
    Supports: Fortification system nature, chronology, defence purpose, and dimensions