Columbia subject headings:
Architecture, Romanesque--Italy, Northern--Congresses.
Art, Romanesque--Italy, Northern--Congresses.
Church architecture--Italy, Northern--Congresses.
Harvard subject headings:
Architecture, Romanesque--Italy, Northern--Congresses.
Church architecture--Italy, Northern--Congresses.
Princeton subject headings:
Architecture, Romanesque--Italy, Northern--Congresses.
Church architecture--Italy, Northern--Congresses.