Columbia subject headings:
Angels--Early works to 1800.
Pseudo-Dionysius, the Areopagite--Teachings.
Theology, Doctrinal--Early works to 1800.
Harvard subject headings:
Angels--Christianity--Early works to 1800.
Mysticism--Early works to 1800
Pseudo-Dionysius, the Areopagite. Celestial hierarchy.
Pseudo-Dionysius, the Areopagite. Mystical theology
Princeton subject headings:
Angels--Christianity--Early works to 1800.
Mysticism--Early works to 1800.
Pseudo-Dionysius, the Areopagite. Celestial hierarchy.
Pseudo-Dionysius, the Areopagite. De mystica theologia.