Columbia subject headings:
Harvard subject headings:
Church history--Middle Ages, 600-1500
Visions in art
Visions in literature
Visions--Psychological aspects.
Visions--Religious aspects--Christianity.
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Visions in art.
Visions in literature.
Visions--Psychological aspects.
Visions--Religious aspects--Christianity.