Columbia subject headings:
City planning--Italy--Tuscany.
Historic districts--Conservation and restoration--Italy--Tuscany.
Historic districts--Italy--Tuscany.
Harvard subject headings:
City planning--Italy--Tuscany.
Historic districts--Conservation and restoration--Italy--Tuscany.
Historic districts--Italy--Tuscany.
Princeton subject headings:
City planning--Italy--Tuscany.
Historic districts--Conservation and restoration--Italy--Tuscany.
Historic districts--Italy--Tuscany.