https://www.catholic.org/encyclopedia/view.php?id=10588
Martin Schongauer - Encyclopedia Volume - Catholic Encyclopedia - Catholic Online
(Also known as SCHON). German painter and engraver, b. at Colmar between 1445 and 1450; d. probably in 1491, it is believed at Breisach. He was the son of...
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https://www.louvre.fr/louvreplus/video-martin-schongauer-le-bel-immortel?autoplay
Martin Schongauer : Le bel immortel
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https://www.christies.com/en/lot/lot-6497575
MARTIN SCHONGAUER (CIRCA 1445-1491), The Nativity | Christie's
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