Columbia subject headings:
Harvard subject headings:
Christian art and symbolism--Medieval, 500-1500
Church history--13th century
Papacy--History--To 1309
Symbolism in politics--History--To 1500.
Princeton subject headings:
Christian art and symbolism--Medieval, 500-1500.
Church history--13th century.
Papacy--History--To 1309.
Symbolism in politics--History--To 1500.