For example, the top 10 cities in the year 1000:
Name Population
1 Cordova, Spain 450,000
2 Kaifeng, China 400,000
3 Constantinople (Istanbul), Turkey 300,000
4 Angkor, Cambodia 200,000
5 Kyoto, Japan 175,000
6 Cairo, Egypt 135,000
7 Baghdad, Iraq 125,000
8 Nishapur (Neyshabur), Iran 125,000
9 Al-Hasa, Saudi Arabia 110,000
10 Patan (Anhilwara), India 100,000
