Upraised Right Hand, with Palm Facing Outward: Study for Saint Peter by Raphael https://www.rawpixel.com/image/8969780/upraised-right-hand-with-palm-facing-outward-study-for-saint-peter-raphaelFree Image from public domain licenseStudies for the Libyan Sibyl (recto); Studies for the Libyan Sibyl and a small Sketch for a Seated Figure (verso) by… https://www.rawpixel.com/image/9184318/image-dark-academia-john-singer-sargent-frescoFree Image from public domain license