Is There Not an Invisible World, from The Juror by Odilon Redon https://www.rawpixel.com/image/8974549/there-not-invisible-world-from-the-juror-odilon-redonFree Image from public domain licenseThe Displeasure of a Sculpture Placed in the Middle of an Exhibition of Paintings, plate 5 from Salon De 1857 by Honoré… https://www.rawpixel.com/image/8994411/image-paper-person-bookFree Image from public domain license