Columbia subject headings:
Alt St. Alban (Cologne, Germany)
Architecture--Conservation and restoration--Germany--Cologne.
Church architecture--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Gürzenich (Cologne, Germany)
War memorials--Germany--Cologne.
Harvard subject headings:
Architecture--Germany--Cologne--Conservation and restoration.
Church architecture--Germany--Cologne.
Haus Gürzernich (Cologne, Germany)
Princeton subject headings:
Architecture, Medieval--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Gürzenich (Cologne, Germany)
Historic buildings--Remodeling for other use--Germany--Cologne.