Source Data Reference for:

City = Lisbon
Time = 1400

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Lisbon	1350	45,000			Tertius Chandler	Four thousand years of urban growth	p475
Lisbon	1400	55,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Lisbon	1400	55,000			Tertius Chandler	Four thousand years of urban growth	p476
Lisbon	1400	55,000			Tertius Chandler	Four thousand years of urban growth	p513
Lisbon	1400	55,000			Tertius Chandler	Four thousand years of urban growth	p539
Lisbon	1400	55,000			Tertius Chandler	Four thousand years of urban growth	p18