Columbia subject headings:
City walls--Italy--Florence.
Florence (Italy)--History--1421-1737.
Fortification--Italy--Florence.
Michelangelo Buonarroti, 1475-1564.
Harvard subject headings:
Florence (Italy)--Buildings, structures, etc.
Florence (Italy)--History--1421-1737
Michelangelo Buonarroti, 1475-1564.
Princeton subject headings:
City walls--Italy--Florence--History.
Florence (Italy)--Buildings, structures, etc.
Florence (Italy)--History--1421-1737.
Fortification--Italy--Florence--History.
Michelangelo Buonarroti, 1475-1564.