Columbia subject headings:
Architecture, Medieval--Germany--Congresses.
Architecture, Medieval--Italy--Congresses.
Bishops--Germany--Congresses.
Bishops--Italy--Congresses.
Church architecture--Germany--Congresses.
Church architecture--Italy--Congresses.
Harvard subject headings:
Architecture, Medieval--Germany--Congresses.
Architecture, Medieval--Italy--Congresses.
Bishops--Germany--Congresses.
Bishops--Italy--Congresses.
Church architecture--Germany--Congresses.
Church architecture--Italy--Congresses.
Princeton subject headings:
Architecture, Medieval--Germany--Congresses.
Architecture, Medieval--Italy--Congresses.
Bishops--Germany--Congresses.
Bishops--Italy--Congresses.
Church architecture--Germany--Congresses.
Church architecture--Italy--Congresses.