 Roman Catholic Suburbicarian Diocese of Velletri–Segni

The Roman Catholic Suburbicarian Diocese of Velletri–Segni is one of the 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.