St. Colman’s Cathedral was built around 1250 on earlier ecclesiastical foundations. It is named after St. Colman who founded the Diocese of Cloyne in 560. Originally a Roman Catholic cathedral, it was converted to an Anglican cathedral in 1678, and has been much altered over the centuries.

The cathedral graveyard, the oldest burial site in Cloyne, is still in use as a collegiate graveyard where both Protestants and Catholics are buried.