Columbia subject headings:
Architecture and society--Germany--Ehrenfeld (Cologne)
Architecture, Domestic--Germany--Ehrenfeld (Cologne)
Architecture--Germany--Ehrenfeld (Cologne)--History--19th century.
Architecture--Germany--Ehrenfeld (Cologne)--History--20th century.
Harvard subject headings:
Architecture and society--Germany--Cologne.
Architecture, Domestic--Germany--Cologne.
Architecture, Modern--19th century--Germany--Cologne.
Architecture, Modern--20th century--Germany--Cologne.
Ehrenfeld (Cologne, Germany)--Buildings, structures, etc.
Princeton subject headings:
Cologne (Germany)--Buildings, structures, etc.
Housing--Germany--Cologne.