From the Renaissance onwards, ancient coins were used by the scholars of the time as direct sources of information about the past. Supplementing historical discourse, they illustrated the portraits of Greek or Roman rulers. Until the 1970s, linking field data to historical events attested by literary sources was a common approach in archaeological studies. This method is still frequently used despite its limitations. There are many scientific interpretations of the consequences of the migrations of the Cimbri and Teutones, which swept through Europe at the end of the 2nd century BC according to the texts. Inter alia, they are said to have been responsible for the settlement of the Helvetii on the Swiss Plateau, the fortification of Manching in Germany and the abandonment of the site of Němčice nad Hanou in the Czech Republic. Celtic coins are often at the heart of historical arguments that are developed by scholars.Let us leave aside the sources and start the investigation again without tunnel vision. Can we really identify and certify migratory phenomena using coins, by comparing the monetary facies of archaeological sites in Switzerland, Germany and the Czech Republic whose occupation covers the period between 150 and 50 BC? What methodology can we use to differentiate between population movements and trade?Until the 1970s, linking field data to historical events attested by literary sources was a common approach in archaeological studies. This method is still frequently used despite its limitations. There are many scientific interpretations of the consequences of the migrations of the Cimbri and Teutones, which swept through Europe at the end of the 2nd century BC according to the texts. Inter alia, they are said to have been responsible for the settlement of the Helvetii on the Swiss Plateau (CH), the fortification of Manching (DE) and the abandonment of the site of Němčice nad Hanou (CZ). Let us leave aside the sources and start the investigation again without tunnel vision. Can we really identify and certify migratory phenomena using coins, by comparing the monetary facies of sites whose occupation covers the period between 150 and 50 BC? What methodology can we use to differentiate between population movements and trade?< Réduire