The ancient settlers of Rome were the Latins.

Here are the answers to your questions based on the provided text:

1) The ancient settlers of Rome were the Latins.

2) The three social classes in ancient Roman society were Patricians, Equites, and Plebeians.

3)

• A Republic is a form of government where power is held by the people and their elected representatives.
• An Empire is when an extensive group of people or countries are ruled by a single supreme authority.

4) An amphitheatre was an outdoor arena built by the Ancient Romans.