Leonardo da Vinci, Salvator Mundi. Reproduction of the painting after restoration by Dianne Dwyer Modestini, a research professor at New York University. Public domain: https://commons.wikimedia.org/wiki/File:Leonardo_da_Vinci,_Salvator_Mundi,_c.1500,_oil_on_walnut,_45.4_×_65.6_cm.jpg