Columbia subject headings:
Architecture--Germany--Mannheim--History--19th century--Exhibitions.
Architecture--Germany--Mannheim--History--20th century--Exhibitions.
Art nouveau (Architecture)--Germany--Mannheim--Exhibitions.
Mannheim (Germany)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Architecture--Germany--Mannheim--19th century--Exhibitions.
Architecture--Germany--Mannheim--20th century--Exhibitions.
Architecture--Germany--Mannheim--History--19th century--Exhibitions.
Architecture--Germany--Mannheim--History--20th century--Exhibitions.
Architecture--Germany--Mannheim--History--Exhibitions.
Art nouveau (Architecture)--Germany--Mannheim--Exhibitions.
Mannheim (Germany)--Buildings, structures, etc.--Exhibitions.
Princeton subject headings:
Architecture, Modern--19th century--Germany (West)--Mannheim--Exhibitions.
Architecture, Modern--20th century--Germany (West)--Mannheim--Exhibitions.
Art nouveau (Architecture)--Germany (West)--Mannheim--Exhibitions.
Mannheim (Germany)--Buildings, structures, etc.--Exhibitions.