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1080
| 1080 • The Song dynasty Chinese polymath scientist and statesman Shen Kuo begins his defensive military campaign against the Tangut people of the Western Xia Kingdom, successfully defending the invasion route to Yan'an. |
1153
May 3
Age: 73y
| 1153 • Estimation: Constantinople, capital of the Byzantine Empire becomes the largest city of the world, taking the lead from Merv in the Seljuk Empire.[http://geography.about.com/library/weekly/aa011201a.htm Geography at about.com] |