Visiomera

As of my last knowledge update in January 2022, here are the three largest cities in Italy with their approximate populations:

1. Rome (Roma) - Population: Approximately 2.8 million
2. Milan (Milano) - Population: Approximately 1.4 million
3. Naples (Napoli) - Population: Approximately 959,000

Please note that population figures may change over time, so it's a good idea to verify the most current population data from official sources for the most up-to-date information.