Question

What was the kingdom north of Rome that taught them how to make sewers and basically everything else important to a civilization

Answer 1

The Etruscans laid the first underground sewers in the city of Rome around 500 BC. These cavernous tunnels below the city's streets were built of finely carved stones, and the Romans were happy to utilize them when they took over the city. Such structures then became the norm in many cities throughout the Roman world.