Sic transit... (1880 - 1932) by Henri van der Stok and Henri van der Stok https://www.rawpixel.com/image/13740539/sic-transit-1880-1932-henri-van-der-stok-and-henri-van-der-stokFree Image from public domain licenseBoethius Instructs a Young Boy in Arithmetic by Virgil Master https://www.rawpixel.com/image/14262869/boethius-instructs-young-boy-arithmetic-virgil-masterFree Image from public domain licenseWashington, D.C. Construction of a bridge and road near Independence Avenue and 14th and 16th Streets, S.W. Engineer… https://www.rawpixel.com/image/12324023/image-plant-person-treeFree Image from public domain license