Saw this story today – the bones of a 10th Century B.C. woman were recently unearthed in Rome. Found in the “necropolis”, they were the first bones to be discovered in that location. Read about it here.Interesting that no matter how advanced we've become, we're still finding history right under our feet.
I have heard that builders regularly uncover ancient Roman artifacts when they are digging for the foundations of buildings in Rome. What they do with these is usually to put pot fragments or whatever into the foundations of the new buildings. I imagine that this is the case unless there's something really special (i.e. solid gold funeral mask, etc.).
Digging in our own backyard one day my family found a license plate from 1910. Sure its not BC but it was a neat thing to find in the city of saginaw MI
From what I understand, ancient artifacts (likely in the form of pottery fragments and other very minor archaeological finds) are regularly unearthed during foundation digs/building construction. These artifacts are then incorporated into the new building, such as by throwing them into cement of the new foundation. When you had an ancient city that was one million strong, you'd think you'd run across quite a few signs of the people of yesteryear.