Columbia subject headings:
Charts, diagrams, etc.--Europe--History--To 1500.
Civilization, Medieval.
Europe--Intellectual life.
Harvard subject headings:
Charts, diagrams, etc.--Europe--History--To 1500.
Civilization, Medieval
Europe--Intellectual life.
Princeton subject headings:
Charts, diagrams, etc.--Europe--History--To 1500.
Civilization, Medieval.
Europe--Intellectual life.