Link of the Day: 19.20.21

19.20.21: 19 cities in the world with 20 million people in the 21st century

19.20.21: 19 cities in the world with 20 million people in the 21st century.

V. interesting. The world’s largest cities in 1000AD were Cordoba, Spain; Kaifeng, China; Istanbul, Turkey; Angkor, Cambodia (felled by urban sprawl); Kyoto, Japan; Cairo, Egypt; Baghdad, Iraq; Beyshabur, Iran; Al-Hasa, Saudi Arabia; Patan, India; Tikal, Guatemala.

via Kottke

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