Co-cathedral

Instances of this occurred in England before the Protestant Reformation in the dioceses of 'Bath and Wells', and of 'Coventry and Lichfield'.

Sometimes the first-named city does not have the main cathedral (actual see) but boasts another distinction such as being a national capital or having an august ecclesiastical past.

The Latin Apostolic Vicariate of Alexandria had a St. Catherine cathedral in Alexandria and two co-cathedrals: the former cathedrals of the merged-in apostolic vicariates of Heliopolis of Egypt (Our Lady, in that Cairo suburb) and of Port Said (Our Lady and St. Michael in that Sinai Canal port).

[4][5] In the case of York the collegiate churches of Beverley, Ripon and Southwell were almost in the same position, but although the archbishop had a stall in each, he had no diocesan cathedra in them.

[6] In the United States, there are several instances in which a Roman Catholic diocese maintains two episcopal see cities, each with its own cathedral or co-cathedral.

Examples include: In some cases the co-cathedrals are in different municipalities, but the diocese's name does not reflect the dual cathedral status.