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May 20, 1498 - The Portuguese explorer Vasco da Gama, having navigated around the southern tip of Africa, arrives near Calicut, India. 1499â1501 - Amerigo Vespucci participates in two voyages to the New World, the first for Spain and the second for Portugal.he Age of Exploration began in earnest with the first voyage of Christopher Columbus in 1492 and ended, at least where present-day Virginians are concerned, with the founding of Jamestown in 1607.
By the beginning of the 19th century, Portugal controlled outposts at six locations in Africa. One was the Cape Verde Islands, located about 700 miles due west of Dakar, Senegal. Discovered by Alvise da Cadamosta of Venice in 1456 and claimed for Portugal by Diogo Gomes about 1458, this archipelago of eight major islands was devoted to sugar cultivation using slaves taken from the African mainland.