This article argues that Machiavelli’s chapters on the Decemvirate ( D 1.35, 1.40-45) advance an internal critique of the juridical discourse of sovereignty. I first contextualize these chapters in relation to several of Machiavelli’s potential sources, including Livy’s Ab urbe condita, Dionysius of Halicarnassus’s Roman Antiquities, and the antiquarian writings of Andrea Fiocchi and Giulio Pomponio Leto. I then analyze Machiavelli’s claim that the decemvirs held “absolute authority” ( autorità assoluta)—an authority that was unconstrained by either laws or countervailing magistrates. (...) I proceed to argue that Machiavelli’s account of the decemvirs’ election contains a web of allusions to the lex regia, the “royal law” by which the Roman people were thought to have conveyed their sovereign power to an emperor. By modeling the decemvirs’ election on the lex regia, Machiavelli reveals the political limitations of the doctrine of popular sovereignty; moreover, he illustrates that even free and fair elections can easily give rise to tyranny. (shrink)