Columbia subject headings:
Civilization, Medieval--Congresses.
Eternity in literature--Congresses.
Eternity--Congresses.
Literature, Medieval--Congresses.
Time in literature--Congresses.
Time, Equation of--History--To 1500--Congresses.
Time--Congresses.
Time--Religious aspects--History--To 1500--Congresses.
Harvard subject headings:
Chronology.
Eternity--History--To 1500--Congresses.
Philosophy, Medieval--Congresses.
Time--History--To 1500--Congresses.
Time--History--To 1500.
Princeton subject headings:
Eternity--History--To 1500--Congresses.
Time--History--To 1500--Congresses.