Columbia subject headings:
Harvard subject headings:
Picture frames and framing--Conservation and restoration--Italy--Florence.
Picture frames and framing--Conservation and restoration--Italy--Siena.
Picture frames and framing--Italy--Florence--Conservation and restoration.
Picture frames and framing--Italy--Florence--History.
Picture frames and framing--Italy--Florence.
Picture frames and framing--Italy--Siena--Conservation and restoration.
Picture frames and framing--Italy--Siena--History.
Picture frames and framing--Italy--Siena.
Princeton subject headings:
Picture frames and framing--Conservation and restoration--Italy--Florence.
Picture frames and framing--Conservation and restoration--Italy--Siena.
Picture frames and framing--Italy--Florence--History.
Picture frames and framing--Italy--Siena--History.