Source Data Reference for:
City = Piazza Armerina
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Piazza Armerina | 1850 | 20,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Piazza Armerina | 1861 | 20,300 | 1861/62 | n/a | Gothaischer Hofkalender |