Columbia subject headings:
Cattedrale (Ravenna, Italy)
Church architecture--Expertising--Italy--Ravenna.
Harvard subject headings:
Cattedrale (Ravenna, Italy)
Church architecture--Expertising--Italy--Ravenna.
Ravenna (Italy)--Buildings, structures, etc.
Princeton subject headings:
Cattedrale (Ravenna, Italy)
Ravenna (Italy)--Buildings, structures, etc.