Columbia subject headings:
Fontana dell'organo (Rome, Italy)
Fountains--Italy--Rome.
Organ (Musical instrument)--Italy--Rome.
Palazzo del Quirinale (Rome, Italy)
Rome (Italy)--Buildings, structures, etc.
Harvard subject headings:
Fontana dell'organo (Rome, Italy)
Hydraulic barrel organ.
Mechanical organs--Italy--Rome.
Palazzo del Quirinale (Rome, Italy)
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Fontana dell'organo (Rome, Italy)
Hydraulic barrel organ.
Mechanical organs--Italy--Rome.
Palazzo del Quirinale (Rome, Italy)
Rome (Italy)--Buildings, structures, etc.