Columbia subject headings:
Architecture--Italy--Volterra.
Piazza San Giovanni (Volterra, Italy)
Volterra (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Italy--Volterra.
Art, Italian--Italy--Volterra.
Christian art and symbolism--Italy--Volterra.
Church architecture--Italy--Volterra.
Piazza San Giovanni (Volterra, Italy)
Plazas--Italy--Volterra.
Volterra (Italy)--Buildings, structures, etc.
Princeton subject headings:
Christian art and symbolism--Italy--Volterra.
Piazza San Giovanni (Volterra, Italy)