A co-cathedral is a cathedral church which shares the function of being a bishop's seat, or cathedra, with another cathedral, often in another city. Instances of this occurred in England before the Protestant Reformation in the dioceses of 'Bath and Wells', and of 'Coventry and Lichfield'. These two dioceses were each named for both cities that served as bishop's seats.
Parma Cathedral is a Roman Catholic cathedral in Parma, Emilia-Romagna (Italy), dedicated to the Assumption of the Blessed Virgin Mary. It is the episcopal seat of the Diocese of Parma. It is an important Italian Romanesque cathedral: the dome, in particular, is decorated by a highly influential illusionistic fresco by Renaissance painter Antonio da Correggio.
The Diocese of Gozo , is a Latin bishopric (diocese) of the Catholic Church in Malta, and the only suffragan in the ecclesiastical province of the Metropolitan Archdiocese of Malta, together covering the insular state.
The Italian Catholic Diocese of Carpi is in Emilia Romagna, Italy. It is a suffragan of the Archdiocese of Modena-Nonantola.
Sarzana Cathedral in Sarzana, Liguria, Italy, is a co-cathedral of the Diocese of La Spezia-Sarzana-Brugnato. It is dedicated to the Assumption of the Virgin Mary. The building is a mixture of the Romanesque and Gothic styles, reflecting the length of the period of its construction, from the early 13th to the late 15th century.
Alatri Cathedral, otherwise the Basilica of Saint Paul, is a Roman Catholic cathedral in Alatri, Lazio, Italy, dedicated to Saint Paul. It was formerly the cathedral of the Diocese of Alatri. Since 30 September 1986 it has been a co-cathedral of the Diocese of Anagni-Alatri. Pope Pius XII declared it a basilica minor on 10 September 1950.
Bitonto Cathedral is a Roman Catholic cathedral in the city of Bitonto in the Province of Bari, Italy.
Acquapendente Cathedral is a Roman Catholic cathedral, dedicated to the Holy Sepulchre, in the town of Acquapendente in Lazio, Italy. Formerly the episcopal seat of the Diocese of Acquapendente, it is now a co-cathedral in the Diocese of Viterbo.
Massa Cathedral is a Roman Catholic cathedral in Massa, Tuscany, central Italy. It is dedicated to Saints Peter and Francis. Formerly a conventual church, it was declared the episcopal seat of the Diocese of Massa Carrara at its creation in 1822, and is now the seat of the bishop of Massa Carrara-Pontremoli.
Bovino Cathedral is a Roman Catholic cathedral in Bovino, region of Apulia, Italy, dedicated to the Assumption of the Virgin Mary. Formerly the episcopal seat of the Diocese of Bovino, it has been since 1986 a co-cathedral in the Archdiocese of Foggia-Bovino.
Vieste Cathedral is a Roman Catholic co-cathedral in Vieste, a former bishopric in Apulia, southern Italy.
Trapani Cathedral, otherwise the Basilica of St. Lawrence the Martyr is the cathedral of the Roman Catholic Diocese of Trapani, dedicated to Saint Lawrence. It is located in Trapani, Sicily, Italy.
Oria Cathedral is a Roman Catholic cathedral in Oria, province of Brindisi, Apulia, Italy, dedicated to the Assumption of the Virgin Mary. It is the episcopal seat of the Diocese of Oria.
Caiazzo Cathedral is a Roman Catholic church in Caiazzo, province of Caserta, Italy, dedicated to the Virgin Mary and Saint Stephen the Bishop. It was previously the cathedral of the diocese of Caiazzo, until in 1986 it became a co-cathedral in the present Diocese of Alife-Caiazzo, which was formed in that year by merging the two older dioceses of Caiazzo and Alife. In 2013 it was declared a minor basilica.
Monopoli Cathedral, otherwise the Basilica of the Madonna della Madia or Santa Maria della Madia is a Roman Catholic cathedral in the town of Monopoli, in the province of Bari, region of Apulia, Italy. It is dedicated to the Virgin Mary under the title of the Madonna della Madia, after an icon kept here. Formerly the episcopal seat of the Diocese of Monopoli, it has been since 1986 a co-cathedral in the Diocese of Conversano-Monopoli.
Castellaneta Cathedral is a Roman Catholic cathedral in Castellaneta, province of Taranto, Apulia, Italy, dedicated to the Assumption of the Virgin Mary. It is the episcopal seat of the Diocese of Castellaneta.
Sarsina Cathedral is a Roman Catholic cathedral in Sarsina, a municipality in the province of Forlì-Cesena, region of Emilia-Romagna, Italy, dedicated to the Annunciation of the Virgin Mary. Formerly the seat of the Bishops of Sarsina, since 1986 it has been a co-cathedral of the Diocese of Cesena-Sarsina.
Nepi Cathedral is a Neoclassical Roman Catholic cathedral located in Nepi, region of Lazio, Italy. It is dedicated to the Assumption of the Virgin Mary and to Saint Anastasia. It was the episcopal seat of the Diocese of Nepi, later Nepi and Sutri, suppressed in 1986, and is now a co-cathedral in the Diocese of Civita Castellana.
Nardò Cathedral is a Roman Catholic cathedral in the town of Nardò, province of Lecce, region of Apulia, Italy, dedicated to the Assumption of the Virgin Mary. Formerly the seat of the bishops of Nardò, since 1986 it has been the episcopal seat of the diocese of Nardò-Gallipoli.
