Columbia subject headings:
Fortification--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Torre dei Conti (Rome, Italy)
Torre delle Milizie (Rome, Italy)
Towers--Italy--Rome.
Harvard subject headings:
Fortification--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Torre dei Conti (Rome, Italy)
Torre delle Milizie (Rome, Italy)
Towers--Italy--Rome.
Princeton subject headings:
Fortification--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
Torre dei Conti (Rome, Italy)
Torre delle Milizie (Rome, Italy)
Towers--Italy--Rome.