According to information that I've found on the internet there is an angelic hierarchy per the following:

First Sphere - Seraphim, Cherubim, Thrones
Second Sphere - Dominions, Virtues, Powers
Third Sphere - Principalities, Archangels, Angels

I have heard of angels and archangels before but not the other ones.  The cherubim apparently has 4 faces (man, ox, lion, and eagle.)   Has anyone ever seen any of these other angelic hierarchies?

I had never heard of this hierarchy before so I was a bit surprised to find this and I'd like to better understand this.   Thanks for your feedback.

Mike