Columbia subject headings:
Architecture, Romanesque--Germany--Cologne.
Art, German.
Church architecture--Germany--Cologne.
Church buildings in art.
Church decoration and ornament--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Romanesque--Germany--Cologne.
Art, German.
Church architecture--Germany--Cologne.
Church buildings in art.
Church decoration and ornament--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Princeton subject headings:
Christian art and symbolism--Germany--Cologne.
Church architecture--Germany--Cologne.
Church buildings in art.
Cologne (Germany)--Buildings, structures, etc.