Columbia subject headings:
Gardens--Italy--Florence--History--19th century.
Gardens--Italy--Florence--History--20th century.
Harvard subject headings:
Architecture, Modern--17th-18th centuries--Italy--Florence.
Florence (Italy)--Buildings, structures, etc.
Gardens--Italy--Florence--History.
Landscape architecture--Italy--Florence--History.
Landscape gardening--Italy--Florence--History.
Public architecture--Italy--Florence--History.
Princeton subject headings:
Gardens--Italy--Florence--History.