Roman Catholic Suburbicarian Diocese of Velletri–Segni
| Suburbicarian Diocese of Velletri–Segni Veliternus-Signinus | |
|---|---|
| Bishopric | |
| Cathedral of Saint Clement | |
| Location | |
| Country | Italy | 
| Ecclesiastical province | Rome | 
| Statistics | |
| Area | 397 km2 (153 sq mi) | 
| Population 
 
 | 
 
 
 | 
| Parishes | 27 | 
| Information | |
| Denomination | Catholic Church | 
| Sui iuris church | Latin Church | 
| Rite | Roman Rite | 
| Cathedral | Velletri Cathedral | 
| Co-cathedral | Santa Maria Assunta | 
| Language | Italian | 
| Current leadership | |
| Pope | Leo XIV | 
| Bishop | Francis Arinze (Cardinal-bishop) Stefano Russo (Diocesan bishop) | 
| Map | |
| Website | |
| www | |
The Suburbicarian Diocese of Velletri–Segni is one of the Latin suburbicarian dioceses, Catholic dioceses in Italy close to Rome with a special status and a cardinal bishop, the bishop of Velletri–Segni. Historically, the see of Velletri was combined with the see of Ostia from 1060 to 1914.
The cathedral in the city of Velletri is dedicated to Saint Clement.
Segni was a small town, a former Roman colony, sited approximately halfway between Rome and Montecassino. In the 12th century, the diocese possessed only seven castelli, 37 churches, 3 chapels, and 3 cloisters.