Columbia subject headings:
Church architecture--Germany--Cologne.
St. Aposteln (Church : Cologne, Germany)
Harvard subject headings:
Christian art and symbolism--Germany--Cologne.
Church architecture--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
St. Aposteln (Church : Cologne, Germany)
Princeton subject headings:
Church architecture--Germany--Cologne.
St. Aposteln (Church : Cologne, Germany)