From 2005 to 2007, a series of communications projects (exhibitions, 3 D modelling, experimental archaeology, guided tours on excavation sites) initiated a dialogue between archaeologists, local representatives and the residents of the New Town; the permanent result of this collaboration is modest but symbolic: the setting up of an interactive screen together with a scale model in the very heart of the New Town on the site of the Merovingian village of Serris "les Ruelles".