International audience ; In Late Iron Age, the south of current Netherlands and the north of Belgium are characterized by the persistence of the byre-houses system, which is an architectural heritage dating back to the Bronze Age and which is common to all Northern Europe. These buildings, in which were cohabiting humans and cattle, reveal notwithstanding some temporal and spatial evolutions, highlighting the local cultural groups. This is especially the case for the more southern regions of that part of Europe, i.e. northern France and central and southern Belgium, where there was a separation between the men and animal housing in the course of the 3rd c. BC, through a generalization of the pens. That transformations can be partly explained by some changes in theorganization of the countryside, as a part of a specific cultural context observed in much of western France and the British Isles.The primary aim of this paper is to highlight the different criteria enabling the identification of cultural groups, on the basis of the architectural study of housing between the Somme and the Meuse-Rhine delta. First, we will deal with houses and pens from the point of view of regional and local architecture. Second, we will discuss the related ceramic/cultural groups (such as the « Marnian Group » or the « Hunsrück-Eifel-Kultur ») and relevantburial practices. The comparison of these data with results from the study of the great architectural regional groups reveals local nuances. Indeed, thecross-referencing of, on the one hand, architectural data and, on the other hand, funeral or ceramic data brings to light some « cultural sub-groups », which are finding themselves at the crossroads of more general complex. ; Au second âge du Fer, le sud des actuels Pays-Bas et le nord de la Belgique sont caractérisés par la persistance du système des maisons-étables, qui est un héritage architectural datant de l’âge du Bronze et qui est commun à l’ensemble de l’Europe septentrionale. Ces édifices, dans lesquels cohabitaient hommes et ...