The document summarizes the accomplishments of several important Portuguese explorers between the 15th and 16th centuries, including Ferdinand Magellan, Prince Henry the Navigator, Vasco da Gama, Pedro Alvares Cabral, and Bartolomeu Dias. It discusses their major voyages of exploration, such as Magellan being the first to circumnavigate the globe, Dias discovering the Cape of Good Hope, and da Gama reaching India by sailing around Africa. These expeditions expanded Portugal's trade routes and territorial holdings.