Source Data Reference for:

City = Istanbul
Time = 1100

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Constantinople	1100	200,000			Tertius Chandler	Four thousand years of urban growth	p470
Constantinople	1100	200,000			Tertius Chandler	Four thousand years of urban growth	p531
Constantinople	1100	200,000			Tertius Chandler	Four thousand years of urban growth	p538
Constantinople	1127		becomes largest in the world overtaking Kaifeng		Tertius Chandler	Four thousand years of urban growth	p525