Diego Portales has become a true legend of Chilean political history, a controversial figure who has prompted very different kinds of interpretation. The aim of this article is to analyze the origin of his political myth. We will study the final phase of the minister's political activities in 1837 from the perspective of Machiavelli's The Prince. By means of the Florentine philosopher's modern political theory, we may explain the circumstances which surrounded the death of Portales. A look at Portales's funeral reveals that it responded to a need to create a republican tradition at the time of the birth of the Hispano-American nations.