Interpreting Mairy as a settlement can seem rather straightforward from the characteristics of the site and especially from the presence of a great number of houses linked with « settlement » pits. This interpretation can however be questioned after a first reflexion on the general organization of the site and a brief analysis of « silo pits » and their contents. The former interpretation of these silo pits as storage pits re-used for refusal is finally rejected. Analysis of the ceramic associations from these pits helps defining 3 phases, but also highlights the coexistence on the site, throughout its occupation, of two different ceramic traditions. The first refers to a northern cultural area : initially influenced by an ancient Michelsberg (Mayen type), it can be later be compared to the Belgian Michelsberg. The second tradition is clearly a Western one, at first close to Menneville and ancient phases of Boury-en-Vexin ; it seems to later be influenced by Southern Rhenish Michelsberg, even if its Western base, best seen through a global morphological connection with the Noyen group, is not questioned. Beyond « ceremonial » aspects seen from silo pits and their content, the presence of two cultural groups on the site shows evidence of its supra-regional dimension, as meeting point of two culturally diffenciated communities.