Columbia subject headings:
Architecture, Domestic--Italy--Umbria.
Gardens--Italy--Umbria.
Landscape architecture--Italy--Umbria.
Parks--Italy--Umbria.
Harvard subject headings:
Gardens--Italy--Umbria.
Parks--Italy--Umbria.
Umbria (Italy)--Buildings, structures, etc.
Princeton subject headings:
Gardens--Italy--Umbria.
Parks--Italy--Umbria.