Great Wall of China
Ancient site
Not one wall but many, built over two thousand years.
The Great Wall is not one wall. It is a whole series of walls, built by different rulers of China over more than two thousand years to keep invaders from the north out.
The parts you see in most photos were built in the time of the Ming emperors, between 1368 and 1644. Measured all together, the walls are more than 21,000 kilometres long.
- all the walls together
- 21,196 km
- years of building
- 2,000+
- World Heritage since
- 1987
- 1
You cannot see it from the Moon with the naked eye. The wall is very long, but far too narrow.
- 2
Guards passed on messages with smoke by day and fire by night, from tower to tower.
- 3
In some places the builders mixed sticky rice into the mortar to make it stronger.
Question 1 of 2
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