Columbia subject headings:
Architecture--Conservation and restoration--Congresses.
Art, Modern--20th century--Congresses.
Public art--Congresses.
Harvard subject headings:
Architecture--Conservation and restoration--Congresses
Art, Modern--20th century--Congresses
Public art--Congresses.
Princeton subject headings:
Architecture--Conservation and restoration--Congresses.
Art, Modern--20th century--Congresses.
Public art--Congresses.