Have You Ever Wondered..

Romans 8:38-39 (New King James Version)
38 For I am persuaded that neither death nor life, nor angels nor principalities nor powers, nor things present nor things to come, 39 nor height nor depth, nor any other created thing, shall be able to separate us from the love of God which is in Christ Jesus our Lord.
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Colossians 1:16 (New King James Version)
16 For by Him all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or principalities or powers. All things were created through Him and for Him.

According to medieval Christian theologians, the Angels are organized into several orders, or Angelic Choirs
The most influential of these classifications was that put forward by Pseudo-Dionysius the Areopagite in the 4th or 5th century, in his book "The Celestial Hierarchy". However, during the Middle Ages, many schemes were proposed, some drawing on and expanding on Pseudo-Dionysius, others suggesting completely different classifications (some authors limited the number of Choirs to seven). Several other hierarchies were proposed, some in nearly inverted order. Scholars of the Middle Ages believed that angels and archangels were lowest in the order and were the only angels directly involved in the affairs of the world of men.

The authors of The Celestial Hierarchy and the Summa Theologica drew on passages from the New Testament, specifically Ephesians 1:21 and Colossians 1:16 (considered by modern scholars to be very tentative and ambiguous sources in relation to the construction of such a schema), in an attempt to reveal a schema of three Hierarchies, Spheres or Triads of angels, with each Hierarchy containing three Orders or Choirs.

From the comparative study of the Old Testament and New Testament passages, including their etymology and semantics, the above mentioned theological works (which contain variations), and esoteric Christian teachings, the descending order of rank can be inferred as following:
The Assumption of the Virgin by Francesco Botticini at the National Gallery London, shows three hierarchies and nine orders of angels, each with different characteristics

    * First Sphere (Old Testament sources)
          o Seraphim
          o Cherubim
          o Thrones (Gr. thronos) (New Testament sources)
    * Second Sphere (New Testament sources)
          o Dominions (Gr. Kyriotetes)
          o Virtues (Gr. Dynamais)
          o Powers (Gr. Exusiai)
    * Third Sphere
          o Principalities (Gr. Archai)
          o Archangels - Archangeloi
          o Angels - Angeloi

St. Bonaventure of Bagnoregio refers to these three, respectively, as the Epiphania, the Hyperphania, and the Hypophania. The Choirs in the second and third spheres, of the present hierarchical list, appear to be also united in pairs. The existence of these pairs of Orders is inferred through their etymological proximity and the apparent affinity in the description of their work-activity

    * Thrones and Dominions (Might, Dynamais);
    * Principalities and Powers (Powers, Exusiai; Ephesians 6:12);
    * Archangels and Angels (Angels, Angeloi).

Note, however, that several variations of the hierarchical order may be found published through the last two millennia.