Cathedrals

thumb|The at Zographou monastery on [[Mount Athos]] A or catholicon () or () refers to one of three things in the Eastern Orthodox Church: The cathedral of a diocese. The major church building (temple) of a monastery corresponding to a conventual church in Western Christianity. A large church in a city at which all the faithful of the city gather to celebrate certain important feasts rather than go to their local parish church.

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 (usually a former see, anchor city of the metropolitan area or the civil capital). 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.

thumb|Florence Cathedral Duomo (, ) is an Italian term for the main church of a city or a town, usually with the features of, or having been built to serve as a cathedral, whether or not it currently plays this role. The Duomo of Monza, for example, has never been a diocesan seat and is by definition not a cathedral. In a similar way, the town of Asolo has not had its own bishop since the 10th century, but the main church (rebuilt since then) is still called the Asolo Duomo. By contradistinction, the Italian word for a cathedral sensu stricto is cattedrale. There is no direct translation of "d

A pro-cathedral (or procathedral) is a parish church that temporarily serves as the cathedral or co-cathedral of a diocese, or a church that has the same function in a Catholic missionary jurisdiction (such as an apostolic prefecture or apostolic administration) that is not yet entitled to a proper cathedral. The 'pro' is abbreviated from pro tempore ('for the time being' in Latin). A pro-cathedral is distinct from a proto-cathedral, the term in the Catholic Church for a former cathedral, which typically results from moving an episcopal see to another (usually new) cathedral, in the same or an