Editing Co-cathedral (section)

=== Italy ===
[[File:Monopoli Cathedral the Basilica of the Madonna della Madia Dec062021 02.jpg|thumb|[[Monopoli Cathedral|Basilica concattedrale di Maria Santissima della Madia]], [[Monopoli]]]]
* The [[Roman Catholic Diocese of Adria-Rovigo|Diocese of Adria-Rovigo]] has a Concattedrale di S. Stefano Papa e Martire Concattedrale dedicated to Martyr [[Pope Stephen I]] in [[Rovigo]], which never was a diocese, besides [[Adria]]'s own Cattedrale di SS. Pietro e Paolo dedicated to Saints Peter and Paul
* The [[Roman Catholic Diocese of Alghero-Bosa]] (on Sardinia) has a Marian Co-Cathedral Concattedrale di Beata Vergine Immaculata Concattedrale di Beata Vergine Immaculata, in [[Bosa]] besides its cathedral episcopal see, the Marian Cattedrale di Beata Maria Vergine Immaculata Concezione, in [[Alghero]]
* The [[Roman Catholic Archdiocese of Amalfi-Cava de' Tirreni|Diocese of Amalfi–Cava de' Tirreni]] has a Marian Co-Cathedral of the [[Visitation of Mary]] in [[Cava de' Tirreni]], besides the cathedral of Apostle Andrew in [[Amalfi]].
* The Diocese of [[Roman Catholic Diocese of Avezzano|Avezzano]] has its cathedral in that city and a co-cathedral in its former see [[Pescina]]
* The [[Roman Catholic Archdiocese of Campobasso-Boiano]] has a cathedral in {{Interlanguage link|Campobasso|it|Cattedrale della Santissima Trinità (Campobasso)|display=yes}} and a co-cathedral in {{Interlanguage link|Bojano|it|Concattedrale di San Bartolomeo (Bojano)|display=yes}}.
* The [[Roman Catholic Diocese of Lucera-Troia]] has its cathedral in Lucera, present see; [[Troia, Apulia|Troia]]'s former cathedral serves as co-cathedral
* The [[Diocese of Melfi–Rapolla–Venosa]] has a cathedral, a Marian Minor Basilica: Basilica Cattedrale di S. Maria Assunta, at [[Melfi]], and two Co-cathedrals: Concattedrale di S. Andrea in [[Venosa]], and Concattedrale di S. Michele Arcangelo, in [[Rapolla]]
* The [[Roman Catholic Diocese of Molfetta-Ruvo-Giovinazzo-Terlizzi]] has a cathedral in [[Molfetta]] and three co-cathedral: in [[Ruvo di Puglia|Ruvo]], [[Giovinazzo]] and [[Terlizzi]]
* The [[Roman Catholic Diocese of Pitigliano-Sovana-Orbetello]] has a cathedral of Peter&Paul in [[Pitigliano]] and a co-cathedral of the Assumptio in [[Orbetello]]
* The [[Archdiocese of Rossano–Cariati]] has a Marian Cathedral di Maria SS. Achiropita at [[Rossano]] and a Co-Cathedral of the Archangel Michael in [[Cariati]]
* The [[Archdiocese of Sant'Angelo dei Lombardi-Conza-Nusco-Bisaccia]] has its cathedral in [[Sant'Angelo dei Lombardi]] and three co-cathedrals in absorbed former bishoprics : [[Conza di Campania]], [[Roman Catholic Diocese of Nusco|Nusco]] and [[Roman Catholic Diocese of Bisaccia|Bisaccia]]
* The [[Roman Catholic Diocese of Teggiano-Policastro|Diocese of Teggiano-Policastro]] has a Co-cathedral of the Assumption in [[Policastro Bussentino]] and a Marian cathedral of S. Maria Maggiore e S. Michele Arcangelo, in [[Teggiano]] 
* The [[Roman Catholic Diocese of Termoli-Larino|Diocese of Termoli-Larino]] has its cathedral in [[Termoli]] and a co-cathedral in [[Larino]]
* The [[Roman Catholic Diocese of Bolzano-Brixen|Diocese of Bolzano-Brixen]] has its cathedral in [[Brixen]] and a co-cathedral in [[Bolzano]]