Columbia subject headings:
Harvard subject headings:
Architecture, Medieval--Germany
Architecture--Germany--History
Princeton subject headings:
Architecture, Medieval--Germany--History.
Cathedrals--Germany--History.
Cathedrals--Germany--Trier--History.
Christian art and symbolism--Medieval, 500-1500.
Church architecture--Germany--History.
Decoration and ornament, Architectural--History--To 1500.
Dom (Trier, Germany)