How the Great Wall of China Nearly Vanished in the 20th Century

The “Great Wall” is really many walls

The familiar picture—broad stone steps climbing green mountains—mostly represents restored or comparatively well-preserved Ming-dynasty sections. It is not a reliable picture of the whole monument.

Fortifications were built, joined, rebuilt and abandoned over many centuries. Construction materials depended on local geology, climate, labour and military needs. Near Beijing, Ming builders made extensive use of stone and brick. Farther west, many walls were formed from rammed earth, gravel, reeds or compacted layers of local material. Some survive as prominent ridges; others are so weathered that an untrained visitor could walk past without realizing they are looking at a major archaeological site.

That difference matters. A stone tower can look ruined and still remain clearly identifiable. A wall made from compacted soil can gradually soften, slump and merge with the surrounding ground. When that happens, the loss may look less dramatic than an explosion—but it can be just as permanent.

Why maintenance faded after the Wall lost its military role

Large fortifications survive only when people keep assigning them a purpose. Once a wall is no longer needed for defence, the incentive to repair roofs, drains, parapets, gates and foundations quickly declines.

After the Qing dynasty consolidated control over territories north of many Ming fortifications, much of the older frontier system became strategically obsolete. Some passes and local structures remained useful, but systematic upkeep was no longer comparable to the enormous military effort that had created them. By the beginning of the 20th century, many stretches had already endured generations of weathering and neglect.

War returned to the old frontier

The Great Wall was designed for conflict, and in the 20th century parts of it once again became military ground. The clearest example is the 1933 fighting between Chinese and Japanese forces around Great Wall passes and strongpoints, including the battles associated with Xifengkou and Gubeikou.[6]

Ancient passes still controlled routes through difficult terrain, while towers and ridges offered observation points, cover and defensible high ground. Modern troops therefore used a landscape built for much older forms of warfare. Some sections retain physical traces associated with that fighting.

It is reasonable to say that warfare damaged particular locations, but it would be misleading to describe the entire Great Wall as continuously shelled throughout the century. The impact was concentrated where military campaigns crossed or occupied the Wall. As with most of its modern history, the damage was regional rather than uniform.

The quiet loss: bricks and stones reused nearby

Some of the most persistent damage did not come from armies or bulldozers. It came one brick at a time.

For communities living beside a neglected ruin, old bricks and dressed stones could be practical building materials. They were already shaped, nearby and apparently ownerless. Reports from Great Wall regions have documented historic bricks reused in houses and removed for sale, while conservation authorities have repeatedly identified theft and excavation as continuing threats.[4][9]

This history should not be reduced to a simple story of careless villagers destroying heritage. In poor rural areas, immediate needs often outweighed the abstract value of a distant national monument. The deeper problem was the absence of clear protection, local resources, effective monitoring and affordable alternatives. When hundreds of people remove small amounts over many years, the result can be the disappearance of whole architectural features without any single spectacular act of destruction.

The Cultural Revolution requires careful wording

China’s Cultural Revolution, from 1966 to 1976, brought widespread attacks on objects, buildings, books and practices associated with the “Four Olds.” Historical and cultural sites across the country suffered severe damage, and professional cultural work was deeply disrupted.[7]

However, the Great Wall is so large and geographically varied that broad claims can become misleading. It is difficult to support the idea of one coordinated nationwide campaign specifically intended to demolish the entire Wall. The stronger, better-supported conclusion is that the period weakened heritage protection, encouraged hostility toward parts of the historic past and created conditions in which neglect, local dismantling and material reuse could continue with little restraint.

In other words, the Cultural Revolution belongs in the story—but as part of a wider collapse in heritage stewardship, not as a single switch that suddenly turned the Great Wall into rubble.

Modern development created new kinds of pressure

As roads, railways, settlements, mines, utilities and tourism facilities expanded, the Great Wall increasingly encountered a problem common to large archaeological landscapes: modern infrastructure often crosses ancient geography.

Not every project destroyed major sections, and many routes were planned around protected remains. Even so, construction can damage a wall directly, disturb buried features, change drainage, destabilize slopes or harm the surrounding setting that gives the monument its meaning. UNESCO has specifically warned that inappropriate tourism facilities and infrastructure can affect the Wall’s authenticity and visual integrity.[2]

The conservation challenge is therefore larger than keeping bricks in place. A watchtower surrounded by intrusive development may remain physically standing while losing much of its historic relationship with the ridge, pass or valley it was built to command.

Nature can erase an earthen wall without drama

The Great Wall crosses deserts, grasslands, mountains and regions with intense seasonal weather. Each material responds differently to exposure, but no section is maintenance-free.

UNESCO conservation documents have identified erosion, tourism pressure and environmental hazards among the Wall’s recurring risks.[2] These processes are slow enough to escape headlines but powerful enough to transform a standing structure into an archaeological trace.

Its meaning changed during the 20th century

The Great Wall was not always celebrated in exactly the same way. At different times, writers and political thinkers interpreted it as evidence of military strength, enormous human cost, failed isolation, national resistance or cultural unity. During the 20th century, its symbolic importance grew and changed alongside modern Chinese nationalism.

This shift helped turn the Wall from obsolete infrastructure into protected heritage. Badaling, near Beijing, was restored in the 1950s and became the first Great Wall section developed for large-scale public tourism.[8] That visibility mattered: visitors, photographs, state promotion and international attention made the monument economically valuable and politically difficult to ignore.

Yet the new image also created a distortion. Millions of people came to know the Great Wall through a few rebuilt sections, while remote earthen walls and ruined towers remained largely unseen. The tourist icon helped save the idea of the Wall, but it did not automatically save every surviving fragment.

Tourism became both rescue plan and risk

Tourism brought ticket revenue, jobs, roads, research, restoration funds and strong public support. It gave authorities a practical reason to stabilize famous sections and made the Great Wall one of the world’s most recognizable heritage sites.

At the same time, heavy foot traffic, souvenir development, cableways, hotels and visually intrusive construction created fresh conservation problems. Poorly designed repairs could also replace weathered historic fabric with surfaces that looked new but communicated less authentic information. UNESCO has specifically noted the vulnerability of the Wall’s setting to inappropriate visitor facilities.[2]

Modern conservation therefore aims for more than a tidy appearance. Current guidance emphasizes minimum intervention, scientific documentation, appropriate materials and different solutions for different wall types. A ruined earthen fortification should not be forced to look like restored Badaling simply because visitors expect crenellated brickwork.

The legal turning points

Protection strengthened gradually rather than through one miraculous rescue. Several milestones helped move the Great Wall from symbolic monument to a heritage system requiring coordinated management.

How much of the Great Wall is really left?

That question sounds simple, but the answer depends on what is being counted. “The Great Wall” can mean Ming walls, fortifications from many dynasties, associated trenches and towers, or only sections whose routes can still be identified.

The national survey conducted from 2006 to 2010 recorded more than 21,000 kilometres of surviving Great Wall resources across 15 provincial-level regions, including roughly 8,800 kilometres attributed to the Ming period.[5] This does not mean every kilometre is a walkable wall. The inventory includes structures in dramatically different conditions—from restored masonry to eroded earthworks and scattered remains.

It is also risky to turn a single percentage into a universal answer. Condition surveys may cover one dynasty, one province or one category of remains. Headlines stating that a fixed share of “the Great Wall” has vanished often compress several different datasets into one dramatic number.

So, how close did we come to losing it?

The famous mountain sections near Beijing were unlikely to vanish without attracting national attention. The larger danger was that thousands of less visible sites could be damaged one by one until only the tourist image survived.

That danger has not disappeared. Current conservation notices continue to call for condition surveys, structural safety measures and protection of the Wall’s historic character.[9] Remote location, enormous scale, different local budgets and rapidly changing environmental conditions make total protection difficult.

Why the story still matters

The Great Wall’s 20th-century history is not a simple tale of destruction followed by rescue. It is a case study in how heritage actually disappears: through repeated small losses, changing political priorities, poverty, conflict, development and environmental decay.

It also shows how preservation can improve. Recognition, research, legal protection, local guardianship and better restoration standards have all changed the Wall’s prospects. But survival is not guaranteed by fame. The restored ridges seen in travel photographs represent only one face of a much more complicated monument.

The real Great Wall is not merely a stone dragon on a mountain. It is a vast archive written across the land—and every missing tower, cut earthwork or reused brick removes a sentence from that archive.