Columbia subject headings:
Church architecture--Italy--Ravenna.
Church buildings--Italy--Ravenna.
Harvard subject headings:
Architecture, Early Christian.
Church architecture--Italy--Ravenna (Province)
Church buildings--Italy--Ravenna (Province)
Ravenna (Italy : Province)--Churches.
Princeton subject headings:
Architecture, Early Christian.
Church architecture--Italy--Ravenna (Province).
Ravenna (Italy : Province)--Churches.