Columbia subject headings:
Architectural museums--Germany--Karlsruhe.
Architecture--Germany--History--19th century--Archival resources.
Architecture--Germany--History--20th century--Archival resources.
Harvard subject headings:
Architectural museums--Germany--Karlsruhe.
Architecture--Germany--19th century--Archival resources.
Architecture--Germany--20th century--Archival resources.
Princeton subject headings: