Columbia subject headings:
Christian art and symbolism--Italy--Siena.
Duomo di Siena.
Harvard subject headings:
Art, Italian--Italy--Siena.
Christian art and symbolism--Italy--Siena.
Church decoration and ornament--Italy--Siena.
Duomo di Siena.
Princeton subject headings:
Christian art and symbolism--Italy--Siena.
Duomo di Siena.
Painting, Italian--Italy--Siena.
Sculpture, Italian--Italy--Siena.