International audienceDuring Late Antiquity, Northern Gaul played an important role in the relations between the Roman Empire and the barbarian world. In order to better understand the lifestyles of these populations, and in particular their dietary practices, a broad isotope analysis (δ13C and δ15N) was undertaken on subjects from the Ilot de la Boucherie site in Amiens.We will present here the first results of this research concerning thirty-three subjects from this site as well as thirty-two subjects from three contemporary neighbouring sites and a corpus of twenty-eight specimens of domestic species.Comparison of the isotope values of human subjects with those of animals from the associated sites has revealed first of all a significant ...