According to Tradition there are nine choirs of angels: Seraphim, Cherubim, Thrones, Principalities, Powers, Dominations, Virtues, Archangels, and Angels (Dionys., De cael. hier. 7)
The Nine choirs of the Angelic Hierarchy are listed in Holy Scripture:
Ge 3:24– “And he cast out Adam: and placed before the paradise of pleasure Cherubims, and a flaming sword, turning every way, to keep the way of the tree of life."
Is 6:1-3 “IN the year that king Ozias died, I saw the Lord sitting upon a throne high and elevated: and his train filled the temple.Upon it stood the seraphims: the one had six wings, and the other had six wings: with two they covered his face, and with two they covered his feet, and with two they flew. And they cried one to another, and said: Holy, holy, holy, the Lord God of hosts, all the earth is full of his glory,”
Ep 1:20–21 “Which he wrought in Christ, raising him up from the dead and setting him on his right hand in the heavenly places. Above all principality and power and virtue and dominion and every name that is named, not only in this world, but also in that which is to come”
Cl 1:16 “For in him were all things created in heaven and on earth, visible and invisible, whether thrones, or dominations, or principalities, or powers. All things were created by him and in him”
1 Pt 3:22 “Who is on the right hand of God, swallowing down death that we might be made heirs of life everlasting: being gone into heaven, the angels and powers and virtues being made subject to him.”
Ju 9. “When Michael the archangel, disputing with the devil, contended about the body of Moses, he durst not bring against him the judgment of railing speech, but said: The Lord command thee”
image from the 'Public domain' via wikimedia commons.Mary Queen of Heaven surrounded by Angels