The history of Fréjus is inextricably linked with the era of the Roman Empire. The city was founded by Julius Caesar around 49 BC and was given the proud name Forum Julii ("Market of Julius"). Initially, the settlement emerged as a strategically important station on the famous Via Aurelia, which connected Rome to Spain, passing through the south of modern France.
The transformation of Fréjus into a powerful ancient center was driven by a combination of geographical and political factors. Emperor Octavian Augustus chose this city to station his fleet, sending here the ships captured from Cleopatra and Mark Antony after the decisive Battle of Actium, which made the local port one of the most important in the Mediterranean. Later, the city became home to veterans of the Eighth Legion, receiving the name Colonia Octavanorum, which ensured an influx of loyal population and significant investment from the imperial treasury.
In ancient times, the city possessed a vast harbor connected to the sea by a canal; however, today this area has receded inland due to silt deposits from the Argens River. During its heyday, Fréjus was a true "Little Rome" in Gaul. Economic prosperity allowed for the creation of impressive urban infrastructure: a monumental amphitheater capable of seating thousands of spectators, a theater, thermal baths, and a complex system of aqueducts were built here, the ruins of which still serve as a reminder of the city's former grandeur.