Hierarchy of Angels
The most influential Catholic angelic hierarchy was that put forward by Pseudo-Dionysius the Areopagite in the 5th or 6th century in his book De Coelesti Hierarchia (On the Celestial Hierarchy). Dionysius described nine levels of spiritual beings which he grouped into three orders:[1][2][3] Highest ordersSeraphimCherubimThrones Middle ordersDominionsVirtuesPowers Lowest ordersPrincipalitiesArcha..
