Columbia subject headings:
Gardens--Italy--Parma--History.
Giardino Ducale (Parma, Italy)
Parma (Italy)--Buildings, structures, etc.
Harvard subject headings:
Gardens--Italy--Parma--History.
Palazzo del giardino (Parma, Italy)
Parma (Italy)--Buildings, structures, etc.
Princeton subject headings:
Gardens--Italy--Parma--History.
Giardino ducale di Parma (Parma, Italy)
Parma (Italy)--Buildings, structures, etc.