Columbia subject headings:
Architecture--Italy--Siena--History--15th century.
Palazzo dei diavoli (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.
Siena (Italy)--History.
Harvard subject headings:
Architecture--Italy--Siena--15th century.
Palazzo dei diavoli (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.
Siena (Italy)--History.
Princeton subject headings:
Architecture, Domestic--Conservation and restoration--Italy--Siena.
Palaces--Conservation and restoration--Italy--Siena.
Palazzo dei Diavoli (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.