The archaeological site of Olbia is unique in France, as it is located on a slight protrusion by the sea, and is the only preserved witness in the entirety of his plan for a network of Greek colonies and castles dating back to the fourth century BC, founded by the first citizens of Marseille: soldiers, colonists, fishermen and farmers Their main task was to secure maritime trade. Today, the unearthed remains allow an understanding of the urban development of the ancient city of Hyeres over a period of 1,000 years, with a group of fortifications, streets, sidewalks, communal wells and apartment blocks divided into houses, shops, thermal baths, sanctuaries, and more.