Source Data Reference for:
City = Cologne
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Cologne | 1850 | 110,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Cologne | 1850 | 95,000 | Tertius Chandler | Four thousand years of urban growth | p24 | ||
| Cologne | 1852 | 100,000 | passed for the 1st time | Tertius Chandler | Four thousand years of urban growth | p542 | |
| Cologne | 1861 | 113,100 | 1861/62 | n/a | Gothaischer Hofkalender |