Roman Italy

Italia, under the Roman Republic and later Empire, was the name of the Italian peninsula.

Roman Italy under Augustus

The "Praetorian Prefecture of Italy" (in yellow) stretched from the Danube river to North Africa

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.