Navigation aérienne. Ballon & appareil de direction construit par M. Pompéien-Piraud, inventeur / / B. Arnaud. https://www.rawpixel.com/image/7688020/image-art-public-domain-posterFree Image from public domain licenseAntique illustration of the grammar of ornament by Owen Jones https://www.rawpixel.com/image/2424/free-illustration-image-grammar-ornament-tribal-patterns-owen-jonesView licenseVintage pattern illustration. Digitally enhanced from our own 19th Century Grammar of Ornament book by Owen Jones. https://www.rawpixel.com/image/2482/free-illustration-image-owen-jones-pattern-abstractFree Image from public domain licenseVintage pattern illustration. Digitally enhanced from our own 19th Century Grammar of Ornament book by Owen Jones. https://www.rawpixel.com/image/2569/free-illustration-image-pattern-owen-jones-grammar-ornamentFree Image from public domain licenseAntique illustration of the grammar of ornament by Owen Jones https://www.rawpixel.com/image/2527/free-illustration-image-owen-jones-the-grammar-ornament-1856View licenseAntique illustration of the grammar of ornament by Owen Jones https://www.rawpixel.com/image/2540/free-illustration-image-owen-jones-pattern-the-grammar-ornament-1856View license