Antium, modern Anzio was one of the ports in the vicinity of Rome that, like Centumcellae (Civitavecchia), Ostia and Puteoli (Pozzuoli), had to take care for commercial traffic by sea and food transports essential for the stability of Rome.
Antium was situated on the west coast of Latium, 48 kms south of Ostia.
The city and landscape was a very popular area for wealthy Roman citizens who built villa's along the coastline. The most important and famous villa was the imperial villa called Nero's villa. Like Caligula also Nero was born in Antium. The later provided the city with a harbour consisting of two basins.