Paris Being Admitted to the Bedchamber of Helen by Jacob de Backer https://www.rawpixel.com/image/14266498/paris-being-admitted-the-bedchamber-helen-jacob-backerFree Image from public domain licenseThe Submission of the Emperor Frederick Barbarossa to Pope Alexander III by Federico Zuccaro https://www.rawpixel.com/image/14246945/image-dogs-face-personFree Image from public domain licenseCostume Studies for Sophocles' "Oedipus Tyrannus" (recto); Costume Studies for Sophocles' "Oedipus Tyrannus" (verso) by… https://www.rawpixel.com/image/14247590/image-paper-cartoon-faceFree Image from public domain licenseMadonna and Child with Angels and the Infant St. John the Baptist by Girolamo Campagna https://www.rawpixel.com/image/14248075/photo-image-angels-face-personFree Image from public domain licenseFour Studies of Heads Drawn over a Copy of Saint John the Evangelist by Correggio (recto); Three Studies of Men (verso) by… https://www.rawpixel.com/image/14246723/image-paper-cartoon-faceFree Image from public domain license