Columbia subject headings:
Cathedrals--Italy--Liguria--Congresses.
Cathedrals--Italy--Piedmont--Congresses.
Cathedrals--Italy--Valle d'Aosta--Congresses.
Church architecture--Italy--Liguria--Congresses.
Church architecture--Italy--Piedmont--Congresses.
Church architecture--Italy--Valle d'Aosta--Congresses.
Harvard subject headings:
Cathedrals--Italy--Liguria--Congresses.
Cathedrals--Italy--Piedmont--Congresses.
Cathedrals--Italy--Valle d'Aosta--Congresses.
Princeton subject headings:
Cathedrals--Italy--Liguria--Congresses.
Cathedrals--Italy--Piedmont--Congresses.
Cathedrals--Italy--Valle d'Aosta--Congresses.
Church architecture--Italy--Liguria--Congresses.
Church architecture--Italy--Piedmont--Congresses.
Church architecture--Italy--Valle d'Aosta--Congresses.