Columbia subject headings:
Fontana dei Quattro Fiumi (Rome, Italy)
Fountains--Conservation and restoration--Italy--Rome.
Fountains--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Harvard subject headings:
Fontana dei Quattro Fiumi (Rome, Italy)
Fountains--Conservation and restoration--Italy--Rome.
Fountains--Italy--Rome
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Fontana dei Quattro Fiumi (Rome, Italy)
Fountains--Conservation and restoration--Italy--Rome.
Fountains--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.