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Duration of Toltec Empire (626 y) is about as big as Duration of Ottoman Empire (623 y)
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Pop. of Dongguan, China (8.22 million people)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.