Columbia subject headings:
Architecture--Conservation and restoration--Italy--Siena--History--19th century.
Buildings--Remodeling for other use--Italy--Siena.
City planning--Italy--Siena--History--19th century.
Siena (Italy)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Italy--Siena--18th century.
City planning--Italy--Siena--History.
Siena (Italy)--Buildings, structures, etc.
Princeton subject headings: