Source Data Reference for:
City = Erfurt
Time = 1200
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Erfurt | 1200 | 21,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Erfurt | 1200 | 21,000 | Tertius Chandler | Four thousand years of urban growth | p16 |