Columbia subject headings:
Architecture, Medieval--Italy--Trento--Congresses.
Torre civica (Trento, Italy)--Congresses.
Trento (Italy)--Buildings, structures, etc.--Congresses.
Harvard subject headings:
Towers--Italy--Trento--Congresses.
Trento (Italy)--Buildings, structures, etc.--Congresses.
Trento (Italy)--History--Congresses.
Princeton subject headings:
Architecture, Medieval--Italy--Trento--Congresses.
Torre civica (Trento, Italy)--Congresses.
Trento (Italy)--Buildings, structures, etc.--Congresses.