Columbia subject headings:
Architecture--Italy--Ravenna--Pictorial works.
Architecture--Italy--Venice--Pictorial works.
Harvard subject headings:
Architecture--Italy--Ravenna--Pictorial works.
Architecture--Italy--Venice--Pictorial works.
Ravenna (Italy)--Buildings, structures, etc.--Pictorial works.
Ravenna (Italy)--Pictorial works.
Venice (Italy)--Buildings, structures, etc.--Pictorial works.
Venice (Italy)--Pictorial works.
Princeton subject headings:
Architecture--Italy--Ravenna.
Architecture--Italy--Venice.
Art, Italian--Italy--Ravenna.
Art, Italian--Italy--Venice.
Ravenna (Italy)--Pictorial works.
Venice (Italy)--Pictorial works.