In this study we have resumed the problem of Neolithic settlements with a complex architecture (defense systems with ditches, palisades, towers, bastions; residential buildings; cult constructions; social constructions) which support the idea of a proto-urban organization since the PPN. We have analyzed current definitions of cities and fairs, which mainly reflect situations from classical antiquity and the Middle Ages, but they cannot be applied to prehistoric realities, which, according to interdisciplinary research, offer another perspective. We also believe that religion too has played an important part in these sites, some of them being real centers of worship.