Columbia subject headings:
Art, Gothic--Europe.
Art, Ottonian--Europe.
Art, Romanesque--Europe.
Christian art and symbolism--Europe--Medieval, 500-1500.
Harvard subject headings:
Art, Gothic
Art, Ottonian.
Art, Romanesque
Christian art and symbolism--Medieval, 500-1500--Europe.
Princeton subject headings:
Art, Gothic.
Art, Medieval.
Art, Ottonian.
Art, Romanesque.