Source Data Reference for:
City = Boulogne
Time = 1800
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Boulogne | 1800 | 12,000 | Jan De Vries | European urbanization 1500-1800 | p274 | ||
| Boulogne | 1800 | 11,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Boulogne | 1815 | 16,600 | Valentin Parisot | Dictionnaire geographique universelle |