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|Founded||11 April 1959|
|Dissolved||11 July 1972|
|Merger of||People's Monarchist Party|
National Monarchist Party
|Merged into||Italian Social Movement|
The new party, like its predecessors, was hampered by provisions in the Italian Constitution of 1946 making it all but impossible to restore the monarchy short of adopting a new constitution. The document specifically forbade a referendum on changing the republican form of government, and (until 2002) barred male members of the House of Savoy from returning to Italy. It was never able to repeat the results of its predecessors: electoral support for its monarchist cause shrank in the 1963 general election (1.8%) and in those of 1968 (1.3%), due to the successes of the Italian Liberal Party (respectively 7.0 and 5.8%).
In 1970, the party formed an alliance with the neo-fascist Italian Social Movement (MSI) known as the National Right (Italian: Destra Nazionale). In 1972, PDIUM fully merged into the MSI. Alfredo Covelli, long-time monarchist leader, was elected president of MSI. In 1976 Covelli led a moderate split of MSI and established National Democracy.
A small part of the party, more tied to liberal and Risorgimento inspiration, however, refused the alliance with the political heirs of fascism and gave life to the Monarchist Alliance.
|Chamber of Deputies|
8 / 630
6 / 630
|Senate of the Republic|
3 / 315
2 / 315
- Vittorio Gorresio (12 April 1959). "I monarchici si sono unificati fondando il "Partito Democratico Italiano"". La Stampa. p. 1.