Columbia subject headings:
Cathedrals--Italy--Emilia-Romagna.
Church architecture--Italy--Emilia-Romagna.
Emilia-Romagna (Italy)--Buildings, structures, etc.
Harvard subject headings:
Cathedrals--Italy--Emilia-Romagna.
Church architecture--Italy--Emilia-Romagna.
Emilia-Romagna (Italy)--Church history--20th century.
Princeton subject headings:
Cathedrals--Italy--Emilia-Romagna.
Church architecture--Italy--Emilia-Romagna.
Emilia-Romagna (Italy)--Church history--20th century.