Tacit Tyranny in Guicciardini and Machiavelli

There is an ongoing debate among historians and political theorists on the nature of the Medicean regime. The importance of this debate is evident especially in the field of political and legal theory, considering the continuous attempts to expunge tyrannophobia from the constitutional landscape. I would like to raise three questions. First: where does Lorenzo's portrait in the Storie Fiorentine come from? Second: what is that remains alive of that old portrait, thirty years later, in his History of Italy? Finally: why is this discourse so important, also for Machiavelli?