The essay aims to follow the events that led at the end of the World War II to the Devolution Acts for some regions and to the constitutional provisions which granted to the others legislative and administrative powers in some fields. It dwells largely on the different circumstances in which it became ripe the decision to drafting and to granting Devolution acts for Sicily, Sardinia, Valle d'Aosta and Trentino-Alto Adige (the region Friuli-Venezia Giulia, although included among the special regions envisaged by the constitution, will be established only in 1963) as well as on the center-periphery relations within the political system.
