The Roman Catholic Diocese of Tinos was a Latin suffragan diocese on some of the Aegean islands of Greece.
The Italian Catholic Diocese of Vallo della Lucania, in Campania, has existed under this name since 1945. It is a suffragan of the Archdiocese of Salerno-Campagna-Acerno.
The Italian Catholic diocese of Nuoro is 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 Italian Catholic archdiocese of Cosenza-Bisignano in Calabria has been a metropolitan see since 2001.
The Archdiocese of Potenza-Muro Lucano-Marsico Nuovo is a Roman Catholic ecclesiastical territory in Basilicata, southern Italy, created in 1986. In that year the Diocese of Muro Lucano was united into the Archdiocese of Potenza e Marsico Nuovo, which had been elevated to an archdiocese in 1973, and made a metropolitan see in 1976. The historical Diocese of Potenza was united with the Diocese of Marsico Nuovo in 1818. The joint diocese was then a suffragan of the Archdiocese of Salerno.
The Diocese of Civita Castellana is a Roman Catholic ecclesiastical territory in Latium, central Italy. It has existed in the current form since 1986, when the Diocese of Nepi e Sutri was united into the Diocese of Civita Castellana, Orte e Gallese, dating from 1805. It is immediately subject to the Holy See.
The Roman Catholic Diocese of Brugnato was a Roman Catholic diocese located in the city of Brugnato in the Province of La Spezia in the Italian region Liguria of Italy. On 25 November 1820, it was united with and suppressed to the Diocese of Luni e Sarzana to form the Diocese of Luni, Sarzana e Brugnato.
The Diocese of Castro di Sardegna was a Roman Catholic diocese located in the town of Oschiri in the Province of Sassari in the Italian region of Sardinia. In 1503, it was suppressed along with the Diocese of Bisarcio and the Diocese of Ottana to form the Diocese of Alghero.
The Roman Catholic Diocese of Alessano was a Roman Catholic diocese in Italy, located in the city of Alessano, in the province of Lecce, part of Apulia region of south-east Italy. On 28 June 1818, it was suppressed to the Diocese of Ugento.
The Diocese of Isola was a Roman Catholic diocese in Italy, located in Isola di Capo Rizzuto, Crotone, Reggio Calabria in the ecclesiastical province of Santa Severina.
The Diocese of Bitetto was a Roman Catholic diocese in Italy, located in the town of Bitetto in the province of Bari, Apulia, Italy. In 1818, it was suppressed to the Diocese of Termoli.
The Diocese of Aquino e Pontecorvo was a Roman Catholic diocese in Italy, located in the city of Aquino in the province of Frosinone, in the Lazio region. In 1818, it was suppressed to the Diocese of Sora-Cassino-Aquino-Pontecorvo.
The Diocese of Giovinazzo e Terlizzi was a Roman Catholic diocese in Italy, located in the city of Giovinazzo, in the Metropolitan City of Bari, Apulia. In 1836, it was suppressed to the Diocese of Molfetta–Giovinazzo–Terlizzi.
The Roman Catholic Diocese of Famagusta was a Latin rite diocese with see in the city of Famagusta, on the island of Cyprus during the crusader rule, and is now a Latin Catholic titular see.
The Diocese of Montalcino was a Roman Catholic diocese located in the town of Montalcino to the west of Pienza, close to the Crete Senesi in Val d'Orcia in Tuscany, Italy. In 1986, it was suppressed and united with the Diocese of Colle di Val d'Elsa and the Archdiocese of Siena to form the Archdiocese of Siena-Colle di Val d'Elsa-Montalcino.
The Diocese of Vico Equense was a Roman Catholic diocese located in the coastal town of Vico Equense in the Metropolitan City of Naples, in Italy. It was suppressed in 1818 to the Archdiocese of Sorrento. It is now included in the Catholic Church's list of titular sees.
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 Capodistria was a Roman Catholic diocese located in the town of Koper in southwestern Slovenia. In 1828, it was suppressed and united with the Diocese of Trieste to form the Diocese of Trieste e Capodistria.
The Diocese of Ravello e Scala was a Roman Catholic diocese located in the town of Ravello on the Amalfi Coast in the province of Salerno, Campania, southern Italy. In 1818, it was suppressed.
The Diocese of San Leone was a Roman Catholic diocese located in the Italian town of San Leone in Calabria. In 1547, it was suppressed to the Archdiocese of Trani. It was restored as a titular see in 1966.
