Columbia subject headings:
Architecture, Gothic--Germany--Cologne.
Christian art and symbolism--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Kölner Dom.
Harvard subject headings:
Architecture, Gothic--Germany--Cologne.
Christian art and symbolism--Germany--Cologne.
Christian art and symbolism--Medieval, 500-1500--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Kölner Dom.
Princeton subject headings:
Architecture, Gothic--Germany (West)--Cologne.
Christian art and symbolism--Germany (West)--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Kölner Dom.