Source Data Reference for:
City = Piacenza
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Piacenza | 1850 | 39,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Piacenza | 1850 | 36,000 | Tertius Chandler | Four thousand years of urban growth | p26 | ||
| Piacenza | 1860 | 30,000 | Touring Club Italiano | Emilia Romagna (Guida Rossa) | p591 | ||
| Piacenza | 1861 | 39,300 | 1861/62 | n/a | Gothaischer Hofkalender |