Stock Photo - 09 October 2019, Italy, Rom: A construction site sign for the new Metro C underground line stands in front of the Colosseum. Not only archaeological treasures are hidden under Rome's ancient imperial forums. Two huge tunnel boring machines are now stuck underground. The reason is the city's struggle to build a new subway line. The originally planned section of Metro C between the Colosseum and the central Piazza Venezia was put on ice for the time being. The public company that supervises the construction is on the verge of bankruptcy. (to dpa: ""Drilling machines ""buried"" under Rome's forum - problem with subway construction"") Photo: Annette Reuther/dpa. - Rom/Italy