Columbia subject headings:
Bishops--Italy--Temporal power--Congresses.
Church and state--Italy--History--Congresses.
Cities and towns, Medieval--Italy--History--Congresses.
Harvard subject headings:
Bishops--Italy--Temporal power--Congresses.
Church and state--Italy--History--Congresses.
Cities and towns, Medieval--Italy--History--Congresses.
Princeton subject headings:
Chapters, Cathedral, collegiate, etc. (Canon law)--Congresses.
Parishes--Italy--Congresses.
Rural chapters--Congresses.