Columbia subject headings:
City planning--Italy--Rome.
Piazza Navona (Rome, Italy)--Buildings, structures, etc.--Designs and plans.
Rome (Italy)--Buildings, structures, etc.--Designs and plans.
Urban beautification--Italy--Rome.
Harvard subject headings:
City planning--Italy--Rome
Piazza Navona (Rome, Italy)--Buildings, structures, etc.--Designs and plans.
Rome (Italy)--Buildings, structures, etc.--Designs and plans.
Urban beautification--Italy--Rome.
Princeton subject headings:
Architecture--Italy--History--20th century.
Piazza Navona (Rome, Italy)
Plazas--Italy--Rome.