ROME, ITALY—Construction of Rome’s new metro Line C has uncovered traces of buildings dating to the third century A.D., according to a report in The Local, Italy. The buildings were found more than 30 feet below ground level on the Caelian Hill, near the Aurelian Walls, which were also built during the third century to surround the ancient city. A fire on the site preserved wood from the structures. The excavation also uncovered plaster fragments and frescoes, pieces of furniture, sculptures, windows, and the skeleton of a dog, which was found on the building’s doorstep. Italy’s National Institute of Geophysics and Vulcanology will try to determine whether seismic activity could have ignited the fire. To read about another discovery made during construction of Rome's metro, go to “While You Are Waiting.”