This work investigates the production of the first images about the lands and inhabitants contacted by the portugueses after overtaking the feared Cape Bojador: the Guinea and the black africans. We analyze how the old conceptions cosmological were organized and adapted after the advance of the experience of the Christian ships by unknown seas pushing the known world s limits. To study this subject, we investigate two sets of sources: the firsts travels writing made by Gomes Eanes Zurara, Diogo Gomes, Luiz Cadamosto e Duarte Pacheco Pereira; and a cartographic colection of mappaemundi, portulan charts and world maps in the early modern era.