Columbia subject headings:
Bagnoregio (Italy)--Buildings, structures, etc.--Pictorial works.
Historic buildings--Italy--Bagnoregio--Pictorial works.
Harvard subject headings:
Architecture--Italy--Bagnoregio--Pictorial works.
Bagnoregio (Italy)--Buildings, structures, etc.--Pictorial works.
Bagnoregio (Italy)--Pictorial works.
Historic buildings--Italy--Bagnoregio--Pictorial works.
Princeton subject headings:
Bagnoregio (Italy)--Buildings, structures, etc.--Pictorial works.
Historic buildings--Italy--Bagnoregio--Pictorial works.