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