725px-Mona_Lisa,_by_Leonardo_da_Vinci,_from_C2RMF_retouched

By Leonardo da Vinci - Cropped and relevelled from File:Mona Lisa, by Leonardo da Vinci, from C2RMF.jpg. Originally C2RMF: Galerie de tableaux en très haute définition: image page, Public Domain, https://commons.wikimedia.org/w/index.php?curid=15442524