The two historical cities of Ivrea

In the master plan of Ivrea the definition of historical city, instead of the more traditional definition of historical centre, regards not only the historical fabrics included inside the ancient walls, but also three unitary modern and quite big neighbourhoods, built during the maximum splendour of Olivetti period, to which the extraordinary architectonical, urban and environmental quality give them a unique historical value. The widening in space and time of town planning policies as concerns protection of historical city involves the research of a more complex operational system.