Columbia subject headings:
Christian antiquities--Conservation and restoration--Congresses.
Christian art and symbolism--Conservation and restoration--Congresses.
Cultural property--Conservation and restoration--Congresses.
Harvard subject headings:
Princeton subject headings:
Christian art and symbolism--Conservation and restoration--Italy--Congresses.
Church architecture--Conservation and restoration--Italy--Congresses.
Church decoration and ornament--Conservation and restoration--Italy--Congresses.