Loop Lifestyle Photographers take pictures during the presentation to the press of an archaeological finding that emerged during the excavations at a Mausoleum in Rome. (AP Photo/Domenico Stinellis) Archaeologists have discovered a rare stone delineating the city limits of ancient Rome that dates from the age of Emperor Claudius in 49 AD and was found during excavations for a new sewage system. Rome Mayor Virginia Raggi was on hand for the unveiling Friday of the pomerial stone, a huge slab of travertine that was used as a sacred. Military and political perimeter marking the edge of the city proper with Rome’s outer territory.