Latest discovery coming as a result of metro construction in Thessaloniki is a Roman road on top of the original Greek one … here’s the salient bits from AP via NPR:

Archaeologists in Greece’s second-largest city have uncovered a 70-meter (230-foot) section of an ancient road built by the Romans that was city’s main travel artery nearly 2,000 years ago.[...]

The excavation site was shown to the public on Monday, when details of the permanent display project were also announced. Several of the large marble paving stones were etched with children’s board games, while others were marked by horse-drawn cart wheels.

Also discovered at the site were remains of tools and lamps, as well as the bases of marble columns.

Viki Tzanakouli, an archaeologist working on the project, told The Associated Press the Roman road was about 1,800 years old, while remains of an older road built by the ancient Greeks 500 years earlier were found underneath it.

“We have found roads on top of each other, revealing the city’s history over the centuries,” Tzanakouli said. “The ancient road, and side roads perpendicular to it appear to closely follow modern roads in the city today.”[...]

• via: Subway Work Unearths Ancient Road In Greece