The history of Hyères stretches back to antiquity, making it one of the oldest settlements on the French Riviera. In the 4th century BC, Greek mariners from Massalia (modern-day Marseille) founded the fortified colony of Olbia on the coast, its name translating to "The Blessed" or "The Happy." It was an important trading outpost connecting sea routes with the mainland. The first documentary mention of the city's name itself — Castrum de Areis — dates back to 963. This name likely derives from the Latin word for salt marshes or marshy areas, which were abundant in the region.
The transformation of Hyères into a prosperous city was due to a unique combination of geographical and economic factors. The town developed at the foot of Castéou hill, providing natural protection and a vantage point while remaining close to the sea. A vital role in the economy was played by the local salt industry: salt, known at the time as "white gold," had been harvested here since ancient times and ensured the region's financial well-being. Furthermore, the construction of a powerful castle atop the hill in the Middle Ages established Hyères as an important administrative center under the protection of the Counts of Provence.
Even in its early stages of development, Hyères stood out not only as a salt production center but also as an agricultural oasis. Thanks to an exceptionally mild microclimate and fertile soil, horticulture flourished here. Local residents successfully grew vegetables, fruits, and exotic plants, which later earned Hyères its reputation as the "City of Palms" and the primary supplier of flowers and early crops to French markets.