Columbia subject headings:
Florence (Italy)--Pictorial works.
Florence (Italy)--Social life and customs--Pictorial works.
Plazas--Italy--Florence--Pictorial works.
Harvard subject headings:
Architecture--Italy--Florence--History.
Florence (Italy)--Buildings, structures, etc.--History.
Historic districts--Italy--Florence--History.
Streets--Italy--Florence--History.
Princeton subject headings:
Florence (Italy)--Pictorial works.
Florence (Italy)--Social life and customs--Pictorial works.
Plazas--Italy--Florence--Pictorial works.