"This Coptic fresco from Karganis in Egypt dates from the 3rd century AD.
It shows Iris suckling her son Harpocrates; considered a parallel
with the Madonna and Child of Christian iconography."
(The Crucible of Christianity, edited by Arnold Toynobee)

"Lady Madonna" (1968):
The on-line encyclopedia says that "the piano playing on this song was inspired by
1950s rock/blues pianist, Fats Domino. McCartney recalled in 1994,
'Lady Madonna' was me sitting down at the piano trying to write a bluesy boogie-woogie thing ...
It reminded me of Fats Domino for some reason, so I started singing a Fats Domino impression. It took
my voice to a very odd place.' Domino himself covered the song later in 1968, and
it became his most recent U.S. Hot 100 hit (peaking at exactly #100)."