Columbia subject headings:
Architecture--Italy--Tuscany.
Palaces--Italy--Tuscany.
Tuscany (Italy)--Description and travel.
Harvard subject headings:
Architecture--Italy--Tuscany
Palaces--Italy--Tuscany.
Tuscany (Italy)--Description and travel.
Princeton subject headings:
Architecture--Italy--Tuscany.
Palaces--Italy--Tuscany.
Tuscany (Italy)--Description and travel.