Pardon me because this is off topic, but when I saw the video from Kingdom of Heaven I suddenly remembered it; Near the end of the sequence, there's this woman/chorus singing some hymn in what sounds like Latin (). It starts at 3:22 in the video. That has always intrigued me. I remember spending hours scouring the Internet to find a clue as to what they're singing, but none of the Latin hymn I came across seemed to have the same words.
If someone can tell me what she's singing, it'll make my day.