Columbia subject headings:
Angels--Early works to 1800.
Church--Early works to 1800.
Clergy--Early works to 1800.
Sacraments--Early works to 1800.
Trinities--Early works to 1800.
Harvard subject headings:
Angels--Christianity--Early works to 1800.
Angels--Early works to 1800.
Church--Early works to 1800
Clergy--Early works to 1800.
Pseudo-Dionysius, the Areopagite.
Sacraments--Early works to 1800
Trinities--Early works to 1800.
Princeton subject headings:
Angels--Early works to 1800.
Chrism--Early works to 1800.
Funeral service--Early works to 1800.
Monasticism and religious orders--Early works to 1800.
Sacraments--Early works to 1800.