Columbia subject headings:
Architecture--Germany--Cologne--History--19th century.
Architecture--Germany--Cologne--History--20th century.
Cologne (Germany)--Buildings, structures, etc.
Gothic revival (Architecture)--Germany--Cologne--History.
Historic buildings--Germany--Cologne.
Harvard subject headings:
Architecture--Germany--Cologne--19th century.
Cologne (Germany)--Buildings, structures, etc.
Gothic revival (Architecture)--Germany--Cologne.
Princeton subject headings:
Architecture--Germany--Cologne--19th century.
Cologne (Germany)--Buildings, structures, etc.
Gothic revival (Architecture)--Germany--Cologne.