Columbia subject headings:
Harvard subject headings:
Castles--Italy--Florence (Province)--History.
Florence (Italy : Province)--Annexation to Florence.
Florence (Italy : Province)--History.
Florence (Italy)--History--To 1421
Florence Region (Italy)--History.
Fortification--Italy--Florence (Province)--History.
Princeton subject headings:
Castles--Italy--Florence (Province)--History.
Florence (Italy : Province)--History.
Florence (Italy)--History--To 1421.
Fortification--Italy--Florence (Province)--History.