Columbia subject headings:
Cathedrals--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Decoration and ornament, Architectural--Germany--Cologne.
Decoration and ornament--Plant forms.
Kölner Dom.
Harvard subject headings:
Princeton subject headings:
Decoration and ornament, Architectural--Germany--Cologne.
Decoration and ornament--Plant forms--Germany--Cologne.
Kölner Dom.
Plants in art.