Columbia subject headings:
Historic buildings--Conservation and restoration--Germany--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Historic house museums--Germany--Congresses.
Harvard subject headings:
Historic buildings--Conservation and restoration--Germany--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Historic house museums--Germany--Congresses.
Princeton subject headings:
Historic buildings--Conservation and restoration--Germany--Congresses.
Historic buildings--Remodeling for other use--Germany--Congresses.
Historic house museums--Germany--Congresses.