I'm currently working on an online version of a local exhibit on WWII.
One of our veterans is Mort Walker of Beetle Bailey fame, who was in Italy in 1945/46 and took many photos and drew a lot of sketches. Among the – tiny – photos were the Forum Romanum, the Arch of Constantine, and the Colosseum.
Also, look at this one.
Enjoy the sketches and cartoons, but please do honor the copyright! It was very gracious of Mr. Walker to give us permission to reproduce items from his scrapbook!