Basilica of St. Thomas the Apostle

The Basilica of St. Thomas the Apostle, additionally Ortona Cathedral, is a Roman Catholic cathedral and minor basilica in Ortona, Abruzzo, Italy, well-known for holding the relics of Saint Thomas the Apostle. It became previously also the episcopal seat of the diocese of Ortona and is now a co-cathedral within the diocese of Lanciano-Ortona. A co-cathedral is a cathedral church which shares the characteristic of being a bishop's seat, or cathedral, with some other cathedral, frequently in any other town.

As in keeping with March 2014, the Catholic church had 303 co-cathedrals, in particular in Europe. Many are former cathedrals, however despite the fact that nonetheless in use, those often aren't granted co-cathedral reputation. Often the diocese with one or more co-cathedrals also has a a couple of name reflecting these, however some have a co-cathedral now not noted within the identify while different former see titles can also be preserved without having a co-cathedral. Sometimes the primary-named city does not have the principle cathedral but boasts another difference which include being a national capital or having an august ecclesiastical beyond.