Portrait of Nettuno

Il vero ritratto di Nettuno.

English: The true portrait of Nettuno.

According to 16th-century maps and cartography, Nettuno would have been located on the west coast of the Italian Peninsula, south of Rome, in the Lazio region.

The cartography of the time, although primarily focused on major trade routes and discoveries, already represented the European coasts and the main port cities of the Mediterranean with some accuracy. Nettuno, as a coastal city and port, would appear on more detailed regional maps of central Italy from that period, probably referred to by its current name or spelling variations of the time.

The city already existed and had strategic importance in the region, so its location would have been known to cartographers of the time, such as Abraham Ortelius or others who produced detailed maps of the Italian peninsula.