Columbia subject headings:
Cologne (Germany)--Buildings, structures, etc.
Worringen (Cologne, Germany)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Domestic--Germany--Cologne.
Architecture--Germany--Cologne.
City planning--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Roggendorf/Thenhoven (Cologne, Germany)--Buildings, structures, etc.
Worringen (Cologne, Germany)--Buildings, structures, etc.
Princeton subject headings: