For Sunday, here's Felix Mendelssohn's "Ave Maria," which is as gorgeous (and as relatively unknown) as you might expect if you've been fortunate enough to stumble across his surprisingly-unfamous choral efforts at any time in the past. (We need to find someone who will do for Mendelssohn what he did for Bach. Also, playlist.)
Provided to YouTube by Universal Music Group International Mendelssohn: Mendelssohn: Ave Maria · The Sixteen · Harry Christophers A Mother's Love - Music For Mary ℗ 2007 Universal Classics & Jazz Released on: 2007-01-01 Composer: Felix Mendelssohn Auto-generated by YouTube.
Attribution(s): "Bell Tower" (source) via CC BY-SA 4.0.