User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-83.253.153.202-20111226235346/@comment-3481504-20111227021232

Alright, Castiel got beaten at least two times by Raphael in the sixth season. Once in "The Third Man", and later in "The Man Who Would Be King". This proves he wasn't an archangel. If he were an archangel, he would've at least been able to hurt Raphael, seeing as all archangels are capable of harming one another, like Gabriel did to Lucifer.