Columbia subject headings:
Abbeys--Italy--Congresses.
Architecture, Medieval--Italy--Congresses.
Church architecture--Italy--Congresses.
Franciscans--Congresses.
Franciscans--Europe--Congresses.
Franciscans--Italy--Congresses.
Harvard subject headings:
Franciscans--Congresses.
Franciscans--Europe--Congresses.
Princeton subject headings:
Abbeys--Italy--Congresses.
Architecture, Medieval--Italy--Congresses.
Church architecture--Italy--Congresses.