Welcome to our forum.
I am not a dream expert and you will find alot of our members, here in the forum who strongly disagree with dream interpertations.
However, this is based on my old traditions: White robed Priests & Bishops usually symbolize prayers to end war or end hatred in the world and or a country/community. I am not sure where you live, but if there is conflict....there are Priests/Bishops praying for peace. Do you remember smell of incense?
Maybe you dreamt this, because you have personal conflict in your life or surrounding you so this gave you a sense of peace and hope. If so, then I am glad for you.
In the end, God knows the truth and God's Will.
I hope I answered you some what for some kind of closure.
God Bless, and again, welcome.