Columbia subject headings:
Architecture, Modern--20th century--Conservation and restoration--Congresses.
Architecture, Modern--21st century--Congresses.
Architecture--Conservation and restoration--Congresses.
Buildings--Repair and reconstruction--Congresses.
Modern movement (Architecture)--Congresses.
Harvard subject headings:
Architecture, Modern--21st century
Architecture--Conservation and restoration
Buildings--Repair and reconstruction
Princeton subject headings:
Architecture, Modern--20th century--Conservation and restoration--Congresses.
Architecture, Modern--21st century--Congresses.
Architecture--Conservation and restoration--Congresses.
Buildings--Repair and reconstruction--Congresses.
Modern movement (Architecture)--Congresses.