Columbia subject headings:
Bronze doors, Medieval.
Christian art and symbolism--Europe--Medieval, 500-1500.
Relief (Sculpture), Romanesque--Europe.
Harvard subject headings:
Princeton subject headings:
Bronze doors, Romanesque--Europe.
Christian art and symbolism--Medieval, 500-1500--Europe.
Katedra w Gnieźnie.
Relief (Sculpture), Romanesque--Europe.
Sofiĭskiĭ sobor v Novgorode.