Columbia subject headings:
Harvard subject headings:
Building materials--Recycling--History.
Monuments--Remodeling for other use--Italy--Venice--Congresses.
Venice (Italy)--Antiquities--Congresses.
Princeton subject headings:
Building materials--Recycling--Italy, Northern--Congresses.
Classicism in architecture--Italy, Northern--Congresses.
Decoration and ornament, Roman--Italy, Northern--Congresses.
Historic buildings--Remodeling for other use--Italy, Northern--Congresses.
Italy, Northern--Antiquities, Roman--Congresses.