Early Morning near Loch Katrine in the Trossachs, Scotland by John Glover https://www.rawpixel.com/image/9183240/image-scotland-john-glover-landscape-illustrationFree Image from public domain licenseA One Hundred Dollar Confederate States of America banknote dated December 22, 1862. Issued during the American Civil War… https://www.rawpixel.com/image/8718110/photo-image-vintage-hand-public-domainFree Image from public domain licenseThe Tetragrammaton and orders of heaven surmounting portraits of famous medical philosophers (Aesculapius, Hippocrates… https://www.rawpixel.com/image/13971601/image-paper-cartoon-faceFree Image from public domain licenseJohn Mackie. Stipple engraving by G. Glover after A. Penley. https://www.rawpixel.com/image/14009224/john-mackie-stipple-engraving-glover-after-penleyFree Image from public domain license