GREAT DISCOVERIES · 4th–14th C.
Mogao Caves, Dunhuang, China
The caves hold Buddhist murals and statues made over a thousand years. Many of the manuscripts are now in museums abroad.
The story, as a puzzle
A sealed library.
In 1900, a Daoist monk found a sealed cave filled with tens of thousands of manuscripts, including the oldest known dated printed book, from 868. Pin the caves.
Where it is
Think you'd have found it on the map?
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