An archeologist checks human bones as ancient roman ruins of former barracks were discovered during work on a new underground line, in Rome, Monday, May 16, 2016. Work on the Metro C being built through the center of Rome has once again run into ancient roman ruins, this time the barracks for the Roman Praetorian guards dating back to the period of Emperor Hadrian, in the second century A.D. Officials say the barracks cover 900 square meters, and include a 100 meter hallway with 39 rooms. (AP Photo/Alessandra Tarantino)