The ancient Roman city of Tridentum lies beneath much of Trento's city center. Centuries of Adige River flooding buried ruins that only recently have been unearthed on public and private land. Beneath this piazza lies the largest of the archaeological sites, revealing some marvels of Roman technology, such as under-floor home heating and under-street sewers complete with manhole covers. The Romans also used lead pipes for four centuries before recognizing it was hazardous
to health. Other excavations you can visit lie beneath the Palazzo Pretoria and the Scrigno del Duomo restaurant.
Piazza Cesare Battisti, Trento, 38100, Italy