Molen op de Tempelhofer Berg, Berlijn (1868 - 1870) by Johann Friedrich Stiehm and E Linde and Co https://www.rawpixel.com/image/13757878/image-paper-person-airplaneFree Image from public domain licenseThe Old Mill at Guy's Cliff, Warwickshire. by Alexander Wilson https://www.rawpixel.com/image/14295887/the-old-mill-guys-cliff-warwickshire-alexander-wilsonFree Image from public domain license