Three Sheets of Gauze, Crossed Obliquely by William Henry Fox Talbot https://www.rawpixel.com/image/14264173/three-sheets-gauze-crossed-obliquely-william-henry-fox-talbotFree Image from public domain licenseSheet with abstract pattern with curved lines and dots https://www.rawpixel.com/image/12491021/sheet-with-abstract-pattern-with-curved-lines-and-dotsFree Image from public domain licenseSundial of Ahaz, leaf from the Postilla Litteralis (Literal Commentary) of Nicholas of Lyra https://www.rawpixel.com/image/12490877/image-paper-shadow-bookFree Image from public domain license