Gaule romaine
Relations stretch back to Classical Antiquity, when Ancient Greek colonies (see Greeks in pre-Roman Gaul) were established in pre-Roman Gaul, the most important of which being Massilia (Greek: Μασσαλία, French: Marseilles), located in southeastern France (which today is the country's oldest city, as well as the second largest, by population). From Massilia and other Greek colonies, Greek goods and elements of the Greek civilization, including coins, spread inland (see Greeks in pre-Roman Gaul). The Gauls in turn became a part of the Hellenistic world proper after the 3rd century BC, following the Gallic invasion of the Balkans and their establishment in Galatia in Asia Minor.