Rome was located on seven hills in west central Italy along the Tiber River, providing fertile farmland and access to sea trade routes. As the Roman Republic expanded across the Mediterranean, it gained control of territories in Europe, North Africa, and the Middle East. The city of Rome had important structures like the Forum, Colosseum, and aqueducts, and religions included the traditional Roman and Etruscan pantheons as well as the newly adopted Christianity. The Roman Republic established systems of government, law, and citizenship, though social classes were divided between the aristocratic patricians and common plebeians.