Columbia subject headings:
Historic buildings--Italy--Ravenna--Pictorial works.
Ravenna (Italy)--Guidebooks.
Ravenna (Italy)--Pictorial works.
Harvard subject headings:
Historic buildings--Italy--Ravenna--Pictorial works.
Ravenna (Italy)--Guidebooks.
Princeton subject headings:
Historic buildings--Italy--Ravenna--Pictorial works.
Ravenna (Italy)--Guidebooks.
Ravenna (Italy)--Pictorial works.