Columbia subject headings:
Gardens--Italy--Rome--Early works to 1800.
Landscape gardening--Italy--Rome--Early works to 1800.
Harvard subject headings:
Gardens--Italy--Rome--Early works to 1800.
Landscape gardening--Italy--Rome--Early works to 1800.
Princeton subject headings:
Gardens--Italy--Rome--Early works to 1800.
Landscape gardening--Italy--Rome--Early works to 1800.