The aim of this thesis is to study the processes of emergence, structuring and mutation of an ancient urban network from the end of the Protohistory to the beginning of the Middle Ages in a micro-region located on the edge of the ancient éduens, lingons and séquanes territories, the Saône Valley. This area is characterized by a density of Gallo-Roman small towns with an amount and a high quality of data unequalled in Gaul, as a result of ancient and recent research. While these small towns were among the first studied in the 1980’s, their exploitation was limited to the study of hierarchies and urban functions during the High Empire, neglecting the chronology and the evolution of the urban system.The site corpus has been homogenized and map...