The Roman Catholic Diocese of Ferentino existed until 1986, when it was united into the new diocese of Frosinone-Veroli-Ferentino.
The Diocese of Vallo della Lucania is a Latin Church diocese of the Catholic Church in Campania, has existed under this name since 1945. It is a suffragan of the Archdiocese of Salerno-Campagna-Acerno.
The Diocese of Mazara del Vallo is a Latin diocese of the Catholic Church in far western Sicily. It is a suffragan of the Archdiocese of Palermo.
The Diocese of Nuoro is a Latin Church diocese of the Catholic Church in Sardinia. It is a suffragan of the archdiocese of Cagliari. Historically it was the diocese of Galtellì until 1779, and then the diocese of Galtellì-Nuoro until 1928.
The Diocese of Isernia-Venafro is a Latin Church diocese of the Catholic Church in Molise. It is a suffragan of the archdiocese of Campobasso-Boiano. In 1852 the historic diocese of Isernia was combined with the diocese of Venafro, to form the diocese of Isernia e Venafro. The seat of the present bishop is Isernia Cathedral, while Venafro Cathedral has become a co-cathedral in the new diocese.
The Italian Catholic diocese of Bertinoro existed from 1360 to 1986. In that year it was merged with the diocese of Forlì to create the diocese of Forlì-Bertinoro.
The Diocese of Alife-Caiazzo is a Latin diocese of the Catholic Church in Campania, southern Italy, created in 1986. In that year the historic Diocese of Alife was united with the Diocese of Caiazzo. The diocese is a suffragan of the Archdiocese of Naples.
The Diocese of Melfi-Rapolla-Venosa is a Latin diocese of the Catholic Church in Basilicata, southern Italy. In 1986 the historic Diocese of Melfi-Rapolla was united with the Diocese of Venosa. The diocese is a suffragan of the Archdiocese of Potenza-Muro Lucano-Marsico Nuovo. The Abbey of the Santissima Trinità at Venosa comes under the Diocese.
The Diocese of Termoli-Larino is a Latin Church diocese of the Catholic Church situated in the province of Campobasso, region of Molise. The commune of Termoli is an important regional seaport. The diocese has existed in its current configuration since 1986, when the diocese of Larino was suppressed and added to its territory. It is a suffragan of the archdiocese of Campobasso-Boiano.
The Diocese of Pozzuoli is a Latin diocese of the Catholic Church in Campania, southern Italy. It is a suffragan of the Metropolitan Roman Catholic Archdiocese of Naples, like its other neighboring dioceses, Aversa and Ischia.
The Diocese of Sessa Aurunca is a Latin diocese of the Catholic Church in southern Italy. Since 1979 it has been a suffragan of the Archdiocese of Naples.
The Archdiocese of Monreale is a Latin archdiocese of the Catholic Church in Sicily. As of 2000 it is no longer a metropolitan see, and is now a suffragan of the Archdiocese of Palermo.
The Italian Catholic diocese of Lacedonia, a suffragan of the archdiocese of Benevento in Campania, existed until 1986 when incorporated into the reorganized Roman Catholic Diocese of Ariano Irpino-Lacedonia.
The Italian Roman Catholic diocese of Acquapendente was an ecclesiastical territory in Lazio. The seat of the bishop was in the cathedral of Acquapendente, dedicated to the Holy Sepulchre. The diocese was established in 1649, when it was created in the place of the suppressed diocese of Castro. In 1986, along with other dioceses, it was merged into the diocese of Viterbo, Acquapendente, Bagnoregio, Montefiascone, Tuscania e San Martino al Monte Cimino.
The Diocese of Minori was a Roman Catholic diocese in Italy, located in Minori, province of Salerno, region of Campania in the ecclesiastical province of Amalfi. In 1815, it was suppressed, and its territory and Catholic population assigned to the Archdiocese of Amalfi.
The Diocese of Ston was a Roman Catholic diocese in Croatia, located in the city of Stagno. In 1828 it was suppressed to the Archdiocese of Dubrovnik.
The Diocese of Guardialfiera or Diocese of Guardia was a Roman Catholic diocese in Italy. The diocese was established in the second half of the 11th century, with seat of the diocese was located in the city of Guardialfiera in the Province of Campobasso in the region of Molise. In 1818, the diocese was suppressed, and its ecclesiastical territory was assigned to the Diocese of Termoli.
The Roman Catholic Diocese of Capri was a Roman Catholic diocese located in the city of Capri on the island of Capri, in the Tyrrhenian Sea off the Sorrentine Peninsula, on the south side of the Gulf of Naples in the Campania region of Italy. On 27 June 1818, it was suppressed to the Archdiocese of Sorrento.
The Diocese of Umbriatico was a Roman Catholic diocese located in the town of Umbriatico in the province of Crotone in southern Italian region of Calabria. In 1818, it was suppressed with the bull De utiliori of Pope Pius VII, and incorporated in the diocese of Cariati.
The Diocese of Pienza was a Roman Catholic diocese located in the town of Pienza in the province of Siena, in the Val d'Orcia in Tuscany between the towns of Montepulciano and Montalcino. Until 1462, the town was known as Corsignano. It took the name Pienza from its most famous native son, Pope Pius II, who elevated the town to the status of a city (civitas), and established the new diocese. The diocese existed as an independent entity from 1462 to 1772, directly subject to the Holy See (Papacy).
