Columbia subject headings:
City planning--Italy--Naples--History.
Piazza del Plebiscito (Naples, Italy)
Plazas--Italy--Naples--History.
Harvard subject headings:
City planning--Italy--Naples--History.
Piazza del Plebiscito (Naples, Italy)
Plazas--Italy--Naples--History.
Princeton subject headings:
City planning--Italy--Naples--History.
Piazza del Plebiscito (Naples, Italy)
Plazas--Italy--Naples--History.