Openwork furniture plaque with sphinx striding through a floral landscape https://www.rawpixel.com/image/9085921/photo-image-art-vintage-public-domainFree Image from public domain license"The Elephant Clock", Folio from a Book of the Knowledge of Ingenious Mechanical Devices by al-Jazari https://www.rawpixel.com/image/9185230/image-paper-art-watercolorFree Image from public domain license"Design on Each Side for Waterwheel Worked by Donkey Power", Folio from a Book of the Knowledge of Ingenious Mechanical… https://www.rawpixel.com/image/9099871/image-paper-art-watercolorFree Image from public domain license"Design for the Water Clock of the Peacocks", from the Kitab fi ma'rifat al-hiyal al-handasiyya (Book of the Knowledge of… https://www.rawpixel.com/image/9185432/image-paper-art-watercolorFree Image from public domain licenseHorizontal parchment page with 15 lines of Kufic writing on each side.. Original from the Minneapolis Institute of Art. https://www.rawpixel.com/image/7655612/image-vintage-art-airplaneFree Image from public domain license