All the big cities of the Western world are facing the flowing back of the past wave of heavy industrialization from their territory. It is not just about the redevelopment and reuse of industrial areas, but also about recovering attention to the built rather than to new developments. Historic districts and peri-industrial suburbs often share a destiny of decline. The answer is the urban regeneration of areas and neighborhoods which, under public coordination, are not an end in themselves but are the fundamental step towards the rebirth of the entire city.