De Coelesti Hierarchia (Greek: Περὶ τῆς Οὐρανίας Ἱεραρχίας, translit. Peri tēs Ouranias Hierarchias, "On the Celestial Hierarchy") is a Pseudo-Dionysian work on angelology, written in Greek and dated to ca. AD the 5th century; it exerted great influence on scholasticism and 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, corresponding to the nine orders of angels recognized by Pope Gregory I.

1. Seraphim, Cherubim, and Thrones;
2. Dominations, Virtues, and Powers;
3. Principalities, Archangels, and Angels.

• Pseudo-Dionysius Areopagita, De Coelesti Hierarchia, Surrey, 1935. Shrine of Wisdom ISBN 978-0-90066-403-8.
• 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.

• Orthodox St. Dionysus Institute in Paris
• Christian angelic hierarchy
• Gregory Palamas
• Apophatic theology
• Hesychasm
• Seven archangels
• Vladimir Lossky

• The Celestial Hierarchy – full text translated into English (1899)
• The Celestial Hierarchy (original Ancient Greek text)