In this photo taken May 6, 2009, by the "APT Comune di Roma" city hall tourist office in Rome, a chunk of Rome's ancient Colosseum and the package that was used to send it from the US are seen. Remorseful and anonymous, an American couple mailed back a chunk of ancient Rome to Italian authorities about 25 years after their Roman holiday. The tourists said in a letter, in foreground, tucked inside the package they mailed that they had picked up the fist-sized fragment of a slab of terracota near the Colosseum. But Rome's archaeological office said Thursday that the piece probably came from a bit farther away, the sprawling area of the Roman Forum or the ancient Palatine Hill.