Columbia subject headings:
Architecture, Domestic--Italy--Siena.
Architecture, Renaissance--Italy--Siena.
Palaces--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Domestic--Italy--Siena.
Architecture, Renaissance--Italy--Siena.
Palaces--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Domestic--Italy--Siena.
Architecture, Renaissance--Italy--Siena.
Palaces--Italy--Siena.
Siena (Italy)--Buildings, structures, etc.