Columbia subject headings:
Buildings--Repair and reconstruction--Congresses.
Historic buildings--Conservation and restoration--Congresses.
Historic buildings--Remodeling for other use--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Monuments--Conservation and restoration--Congresses.
Monuments--Remodeling for other use--Congresses.
Harvard subject headings:
Buildings--Repair and reconstruction--Congresses
Historic buildings--Conservation and restoration--Congresses.
Historic buildings--Remodeling for other use--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Monuments--Conservation and restoration--Congresses.
Monuments--Remodeling for other use--Congresses.
Princeton subject headings:
Buildings--Repair and reconstruction--Congresses.
Historic buildings--Conservation and restoration--Congresses.
Historic buildings--Remodeling for other use--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Monuments--Conservation and restoration--Congresses.
Monuments--Remodeling for other use--Congresses.