Portuguese discovery of the sea route to India It is often regarded as the most important work of Portuguese literature. The work celebrates the discovery of a sea route to India by the Portuguese explorer Vasco da Gama. King Manuel did not share that opinion. Keeping the D. João II plan, he went ahead to equip the ships and chose Vasco da Gama as the leader of this expedition and the captain of the armada. According to the original plan, John II had appointed his father, Stephen da Gama, to head the armada; but by the time of implementing the plan, both were deceased. Portuguese were after spices,
Portuguese discoveries tip of Africa, disproving the view that had existed since Ptolemy that the Indian Ocean was separate from the Atlantic. Also at this time, Pêro da Covilhã reached India via Egypt and Yemen, and visited Madagascar. He recommended further exploration of the southern route. As the Portuguese explored the coastlines of Africa, they left behind a series of padrões, stone crosses inscribed with the Portuguese coat of arms marking their claims, and built forts and trading posts. From these bases, the Portuguese engaged profitably in the slave and gold trades. Portugal enjoyed a virtual monopoly of the Atlantic slave trade