O Euchari

Garmarna's version of the song from the 12th Century composer Hildegard von Bingen. Among other things, she was (per WP) an author, counselor, linguist, naturalist, scientist, philosopher, physician, herbalist, poet, channeller, visionary, composer, and polymath. Whether the song and the video are too modern or not is left to you to determine. See also the traditional version of O Euchari.