Columbia subject headings:
Palazzo del governo (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.
Harvard subject headings:
Decoration and ornament--Italy--Siena.
Palazzo del governo (Siena, Italy)
Palazzo della provincia (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.
Princeton subject headings:
Painting, Italian--Italy--Siena.
Palazzo pubblico (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.