What is the name of the song on the preview for "Trade"?

Question

I saw the preview in theaters. I don't think the movie is even out yet. Maybe. The song had a man singing the whole time but i don't think there were any words, just humming or something. The song and the man singing were obviously not from America. The song was very peaceful but at the same time very powerful and i loved it a lot. I searched on the internet for a while but found nothing. PLEASE HELP!

Answer 1

Agnus Dei" by Rufus Wainwright