'''De Coelesti Hierarchia''' (''Celestial Hierarchy'') is a
Pseudo-Dionysian work on
angelology (dated to ca. the 5th century) which exerted great influence on
scholasticism. It treats at great length the hierarchies of
angels.
Thomas Aquinas (''
Summa Theologica'' (I.108) follows the ''Hierarchia'' (6.7) in dividing the angels into three hierarchies each of which contains three orders, based on their proximity to God, correspoding to the nine orders of angels recognized by
St. Gregory.
#Seraphim, Cherubim, and Thrones;
#Dominations, Virtues, and Powers;
#Principalities, Archangels, and Angels.
Editions
★ G. Heil, A. M. Ritter, ''Pseudo-Dionysius Areopagita. De Coelesti Hierarchia, De Ecclesiastica Hierarchia, De Mystica Theologia, Epistulae'' (1991) ISBN 978-3-11-012041-7.