In this paper I will show how the republican movement in Portugal created a new narrative of national identity at the end of the XIX century. The aim of this project was to provide a solid stance to destroy monarchy. With the triumph of Republicanism in 1910 this new identity become official and the Portuguese people was socialized in it. In this paper I will show how race, culture and language were movilized as markers of identity against traditional identity sources like monarchy and religion. I will also show why this narration is apropiated, adopted and adapted, by authoritarianism during the XX century. In sum, I will show, from the stance of political theory, that identity narrations are flexible and can be movilized for radically differente political pourpouses.