Columbia subject headings:
Architecture--Germany--Mannheim--History--18th century.
Architecture--Germany--Mannheim--History--19th century.
Architecture--Germany--Mannheim.
Harvard subject headings:
Architecture, Germanic.
Architecture--Germany--History
Princeton subject headings:
Architecture--Germany--Mannheim--18th century.
Architecture--Germany--Mannheim--19th century.
Architecture--Germany--Mannheim.