Ontwerp voor de decoratie Kunsten en Wetenschappen op de Noordermarkt (1795) by anonymous and Jurriaan Andriessen https://www.rawpixel.com/image/13785912/image-paper-cloud-cartoonFree Image from public domain licenseMantle clock (pendule) (1811) by anonymous and Benjamin Lewis Vulliamy https://www.rawpixel.com/image/13749650/mantle-clock-pendule-1811-anonymous-and-benjamin-lewis-vulliamyFree Image from public domain license