Columbia subject headings:
Civilization, Medieval--Psychological aspects--Congresses.
Dreams in literature--Congresses.
Dreams--History--Congresses.
Dreams--Religious aspects--Congresses.
Harvard subject headings:
Civilization, Medieval--Psychological aspects--Congresses.
Dreams in literature--Congresses.
Dreams--History--Congresses.
Dreams--Religious aspects--Congresses.
Princeton subject headings:
Dreams--Religious aspects.