Columbia subject headings:
Art--Conservation and restoration--Italy--Florence--History.
Gems--Italy--Florence--History.
Medici, House of--Art patronage.
Opificio delle pietre dure--History.
Precious stone industry--Italy--Florence--History.
Stone carving--Italy--Florence--History.
Harvard subject headings:
Art--Conservation and restoration--Italy--Florence--History.
Gems--Italy--Florence--History.
Medici, House of--Art patronage.
Opificio delle pietre dure--History.
Precious stone industry--Italy--Florence--History.
Stone carving--Italy--Florence--History.
Princeton subject headings:
Art--Conservation and restoration--Italy--Florence--History.
Gems--Italy--Florence--History.
Medici, House of--Art patronage.
Opificio delle pietre dure--History.
Precious stone industry--Italy--Florence--History.
Stone carving--Italy--Florence--History.