Columbia subject headings:
Architecture--Italy--Florence--History--19th century.
Architecture--Italy--Florence--History--20th century.
Architecture--Italy--Florence.
Florence (Italy)--Buildings, structures, etc.
Monuments--Italy--Florence.
Harvard subject headings:
Architecture, Modern--19th century--Italy--Florence.
Architecture--Italy--20th century--Florence.
Architecture--Italy--Florence
Florence (Italy)--Buildings, structures, etc.
Princeton subject headings: