The present thesis deals with the evolution of the role of the President of the Council of Ministers within the operating mechanisms of the Italian form of government. The systematic reconstruction of this institutional figure has always been in the background of more complex analyses concerning the parliamentary form of government. While the “Statuto Albertino� did not even mention such role, various unsuccessful attempts to regulate the president’s prerogatives with legislative acts were made during the “periodo statutario�. Then, an obscure definition given in the Article 95 of the Italian Constitution allowed divergent interpretations on the position of the President of the Council within the governmental structure, until the late implementation of the constitutional provision, in Law No. 400/88, managed to have expressly recognised the constitutional attributions of this figure. Thus, the aim of this research is to reconstruct the constitutional ‘role’ of the PCM, especially on the basis of recent developments in the national form of government. In this sense, the interpretation of the constitutional role of the President of the Council we propose in this research is not limited to the coordination and direction of activities within the Council of Ministers. On the contrary, the role is interpreted in a broader sense. In fact, it encompasses the coordination of public government policies and is functional to the performance of a ‘systemic’ coordination of the entire constitutional structure. Such coordination is made possible also through the determination of inter-institutional procedures, involving various governmental structures, the Parliament and different levels of government, including the supranational ones.