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