Over the last fifty years or nearly, aerial survey of the Yonne valley has revealed a very great number of organised structures : 11 villages with 42 houses, 30 enclosures of various type, 7 mining sites and 5 burial grounds of the « Passy » type. These sites, nearly all or low valley ground, belong to specific micro-areas, themselves conditionned by topography, and directly related to hydrography (on plateau edges, river junctions, fords, etc). Their distribution tends to resemble, therefore, certain more recent « administrative » divisions. Danubian villages may provide a better understanding of ground occupation in early Neolithic times, but enclosures typology and the distribution of mining pits and of « Passy » type structures bring fresher information on certain aspects of production economics and on social hierarchy for the middle Neolithic. As observations multiply the Yonne basin is becoming a pilot area for our grasp of territory control by succeeding cultural groups.