Columbia subject headings:
Art, Italian--Italy--Siena.
Church decoration and ornament--Italy--Siena.
Duomo di Siena.
Harvard subject headings:
Church decoration and ornament--Italy--Siena--Early works to 1800.
Duomo di Siena--Early works to 1800.
Inscriptions--Italy--Siena--Early works to 1800.
Siena (Italy)--Buildings, structures, etc.--Early works to 1800.
Princeton subject headings:
Duomo di Siena.
Siena (Italy)--Buildings, structures, etc.