Hours of Louis de Laval, France ca. 1480 (BnF, Latin 920, fols. 180r, 181r, 182r)
Shamelessly Pinched from the Discarding Images FB page (which is awesome, BTW)
You should click over and see all the pictures. I love this because it's not turtles, but halos, all the way down. Good reminder that holiness is for everyone -- and meant to be ordinary.