When was the great Zimbabwe built?

The Great Zimbabwe state started as a political unit before about 1250. Radio carbon
dates for the stone walls are 1100, 1300, 1340 and 1350, says D.N Beach in 1980.
Archaeology revealed that the few upper class huts of the rulers were basically a middle
13th century construction. The radio carbon dates indicate that the state thrived in the 14th
century. As the power of the ruling class increased, it organised the construction of stone
walls between 1000 and 1200 AD.

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