Columbia subject headings:
Harvard subject headings:
Art patronage--Italy, Northern.
Facades--Italy, Northern.
Italy, Northern--Church history.
Sculpture, Italian--Italy, Northern.
Sculpture, Romanesque--Italy, Northern.
Princeton subject headings:
Art patronage--Italy, Northern.
Facades--Italy, Northern.
Italy, Northern--Church history.
Sculpture, Italian--Italy, Northern.
Sculpture, Romanesque--Italy, Northern.