The discovery voyages of Portuguese sailors in the 15th and 16th centuries were a significant stimulus and mover of the European Renaissance, and through their reports, they opened the early modern "windows" to discover the world beyond the ancient. In describing the areas and nations of Africa, there is a particularly noticeable attempt to bring closer what they have actually seen, experienced, although, of course, they understood it from the perspective of their time. Duart Lopes' book "Warhaffte und Eigentliche Beschreibung dess Koenigsreich Congo in Africa" is one of the groundbreaking works that sought to bring closer and realistically describe the areas that were previously known as "hic sunt leones".