In this article, we try to establish the ways of appropriation of classical culture in the Iberian Peninsula, especially, in Portugal (reign of Avis) and Castile courts, in the XVth century according to some works of humanist character. In particular, it means to examine the actions of some men of letters from that period, which, by translations and commentaries, pointed out the directions of a strategic constituion of a vernacular literature.51111128