XIII° final provision of the Italian constitution 

Till the 2002 the text said: "... former kings of Savoy, their wives and male descendant are forbidden to enter the italian territory..."
This provision was written due to the contiguity between fascism and monarchy, that is said to have not taken the rights decisions to prevent fascism. In the 2002 the constitutional revision number 1, 23 october, erased the provision.

Sorry for my not good english.