Houses and Figure (1890) by Vincent Van Gogh. Original from the Barnes Foundation. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/537422/free-illustration-image-van-gogh-cottageFree Image from public domain licenseAnnual dinner : September 8th 1904, Waldorf-Astoria, New York / Society of Chemical Industry. https://www.rawpixel.com/image/13965382/image-paper-book-public-domainFree Image from public domain license