Columbia subject headings:
Bologna (Italy : Province)--Church history.
Christian art and symbolism--Italy--Bologna (Province)
Church buildings--Italy--Bologna (Province)--History.
Harvard subject headings:
Church buildings--Italy--Bologna (Province)
Religious architecture--Italy--Bologna (Province)
Princeton subject headings:
Bologna (Italy : Province)--Church history.
Christian art and symbolism--Italy--Bologna (Province).
Church buildings--Italy--Bologna (Province)--History.