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The Angkors
If you’ve ever visited Cambodia, then you’re certainly familiar with the Angkor Wat temple. The people who built it – the Angkors, duh – made up a huge urban civilization with a population that may have reached a million during its peak in 1200 AD. If so, it would have made it the largest urban settlement in the world at that time. But natural disasters and war took its toll on the Angkors, whose civilization began to decline starting in the 1300s and came to an end in 1431 when they were defeated by the Ayutthaya Kingdom.
