Chartered on March 5, 1850 by the Commonwealth of Kentucky, the Louisville and Nashville Railroad Company (L&N) set out “to build a line railroad between Louisville and the Tennessee state line in the direction of Nashville.” In doing so, the L&N proved to be one of Louisville’s largest employers; in 1901 alone, L&N’s working population was 20,053 persons and by 1926 that number had more than doubled to 53,029. Comprised of architectural drawings, postcards, and photographs, the following twenty images depict the tools, buildings, bridges, people, and of course trains, that made this feat possible.