Here is a wonderful work by Piero della Francesca (1415-1492). I had not known of him until I read this week's New Yorker. Normally we see shepherds gathered around, but here we have what I believe are 5 young ladies, 2 of them strumming to the beat of kumbaya. This is the first sentence of the article by Peter Schjeldahl, entitled "Heaven on Earth":
The supreme early-Renaissance master Piero della Francesca
is like no other artist in my experience:
not better, exactly, but loftily apart, defying comparison.