Columbia subject headings:
Architecture--Conservation and restoration.
Historic buildings--United States.
Monuments--Conservation and restoration--United States.
Harvard subject headings:
Architecture--Conservation and restoration
Architecture--United States--Conservation and restoration.
Historic buildings--United States
Monuments--Conservation and restoration--United States.
Princeton subject headings:
Architecture--Conservation and restoration.
Monuments--United States--Conservation and restoration.
United States--Historic houses, etc.