Columbia subject headings:
Opificio delle pietre dure--Congresses.
Painting--Conservation and restoration--Congresses.
Painting--Conservation and restoration--Italy--Florence--Congresses.
Harvard subject headings:
Opificio delle pietre dure--Congresses.
Painting--Conservation and restoration--Italy--Florence--Congresses.
Princeton subject headings:
Opificio delle pietre dure--Congresses.
Painting--Conservation and restoration--Congresses.
Painting--Conservation and restoration--Italy--Florence--Congresses.