Another one I love is Panis Angelicus sung by the Australian, Mirusia Louwerse.
Notice what looks to be over 100 uniformed players of brass instruments lining up along the city square to play a soft but powerful accompaniment to Mirusia's stunning voice. Imagine how thrilling it must have been to be there!
Panis Angelicus has special significance, too, because the lyrics were written by St. Thomas Aquinas, that Dominican friar of the 13th century. He wrote the hymn for the Catholic feast of Corpus Christi. So the music is a kind of echo of Medieval times.