Columbia subject headings:
Chivalry.
Civilization, Medieval.
Feudalism.
Harvard subject headings:
Chivalry
Civilization, Medieval
Feudalism
Pembroke, William Marshal, Earl of, 1144?-1219.
Princeton subject headings:
Chivalry.
Civilization, Medieval.
Feudalism.
Pembroke, William Marshal, Earl of, 1144?-1219.