This is a list of cathedrals in Italy, including also Vatican City and San Marino. This is intended to be a complete list of extant cathedrals – i.e., churches that are the seats of bishops – and co-cathedrals. Many former cathedrals and proto-cathedrals are also included, but many more are yet to be added. Almost all cathedrals in Italy are Roman Catholic, but any that are not are also listed here.