David with the Head of Goliath by Parmigianino Francesco Mazzola https://www.rawpixel.com/image/14248131/david-with-the-head-goliath-parmigianino-francesco-mazzolaFree Image from public domain licenseStudy of a Man with Various Sketches (recto); Study of a Man's Draped Leg (verso) by Polidoro da Caravaggio Polidoro Caldara https://www.rawpixel.com/image/14246257/image-hand-person-artFree Image from public domain licenseChrist Carrying the Cross (recto); The Resurrection (verso) by Sodoma Giovanni Antonio Bazzi https://www.rawpixel.com/image/14247679/image-face-christs-personFree Image from public domain licenseHercules Resting after Killing the Hydra by Giulio Romano Giulio Pippi https://www.rawpixel.com/image/14248132/hercules-resting-after-killing-the-hydra-giulio-romano-giulio-pippiFree Image from public domain licenseStudies of the Madonna and Child (recto); Studies of the Madonna and Child and of an Architectural Detail (verso) by… https://www.rawpixel.com/image/14246950/image-paper-cartoon-faceFree Image from public domain license