Archaeologists work in an archaeological dig in Rome's central Piazza Venezia Square, with the Monument to the Unknown Soldier in the background, Thursday, Feb. 1, 2007. The perennial tug-of-war between preserving ancient treasures and developing much-needed infrastructure is moving underground, as the city mobilizes archaeologists to probe the bowels of the Eternal City in preparation for a new, 25-kilometer (15-mile), subway line, Metro C. (AP Photo/Alessandra Tarantino)
A view of pieces of medieval and ancient Roman ceramics found in an archeological dig in central Rome, in this Jan. 31, 2007 photo. The perennial tug-of-war between preserving ancient treasures and developing much-needed infrastructure is moving underground, as the city mobilizes archaelogists to probe the bowels of the Eternal City in preparation for a new, 25-kilometer (15-mile), subway line, Metro C. (AP Photo/Pier Paolo Cito)