Roman Italy
Italia, under the Roman Republic and later Empire, was the name of the Italian peninsula.
Italia was the home of the capital of the Roman Empire - Rome itself.
400 years later the Empire was much larger, but on the point of collapse. In the last period the Empire was governed from Byzantium (Constantinople), not Rome.
Roman Italy Media
The Tropaeum Alpium The Victory Monument of the Alps, La Turbie, France, marked the Augustan border between Italy and Gaul