Burnside Bridge, Across Antietam Creek, Maryland, from Gardner's Sketchbook of the Civil War https://www.rawpixel.com/image/9067093/photo-image-art-vintage-public-domainFree Image from public domain licenseSeated Hercules in the act of shooting at the stymphalian birds https://www.rawpixel.com/image/12838281/seated-hercules-the-act-shooting-the-stymphalian-birdsFree Image from public domain license