Columbia subject headings:
Architecture, Medieval--Italy--Florence (Province)
Castles--Italy--Florence (Province)
Florence (Italy : Province)--History.
Harvard subject headings:
Architecture, Medieval--Italy--Florence (Province)
Castles--Italy--Florence (Province)
Florence (Italy : Province)--History.
Princeton subject headings:
Architecture, Medieval--Italy--Florence (Province).
Castles--Italy--Florence (Province).
Florence (Italy : Province)--History.