Vasco da Gama in the context of "Spanish explorers"

The Portuguese Empire was a colonial empire that existed between 1415 and 1999. In conjunction with the Spanish Empire, it ushered in the European Age of Discovery. It achieved a global scale, controlling vast portions of the Americas, Africa and various islands in Asia and Oceania. It was one of the most powerful empires of the early modern period, while at its greatest extent in 1820, covering 5.5 million square km (2.1 million square miles), making it among the largest empires in history. Composed of colonies, factories, and later overseas territories, it was the longest-lived colonial empire in history, from the conquest of Ceuta in North Africa in 1415 to the handover of Macau to China in 1999.

The power and influence of the Kingdom of Portugal would eventually expand across the globe. In the wake of the Reconquista, Portuguese sailors began exploring the coast of Africa and the Atlantic archipelagos in 1418–1419, using recent developments in navigation, cartography, and maritime technology such as the caravel, with the aim of finding a sea route to the source of the lucrative spice trade. In 1488, Bartolomeu Dias rounded the Cape of Good Hope and Cape Agulhas, and in 1498 Vasco da Gama reached India. In 1500, Pedro Álvares Cabral, while on a voyage to India, reached what would later be Brazil.

Bartolomeu Dias (c. 1450 – 29 May 1500) was a Portuguese mariner and explorer. In 1488, he became the first European navigator to round the southern tip of Africa and to demonstrate that the most effective southward route for ships is in the open ocean, well to the west of the African coast. His discoveries were later used by Vasco da Gama to establish a sea route between Europe and Asia.

The Portuguese discovery of the sea route to India was the first recorded trip directly from Europe to the Indian subcontinent, via the Cape of Good Hope. Under the command of the Portuguese explorer Vasco da Gama, it was undertaken during the reign of King Manuel in 1497–1499. It is one of the most important events of the Age of Discovery and the Portuguese Empire, and it initiated the Portuguese maritime trade on the Malabar Coast and other parts of the Indian Ocean, the military presence and settlements of the Portuguese in Goa and Bombay.

Portuguese maritime explorations resulted in numerous territories and maritime routes recorded by the Portuguese on journeys during the 15th and 16th centuries. Portuguese sailors were at the vanguard of European exploration, chronicling and mapping the coasts of Africa and Asia, then known as the East Indies, Canada and Brazil (the West Indies), in what became known as the Age of Discovery.

Methodical expeditions started in 1419 along the coast of West Africa under the sponsorship of prince Henry the Navigator, whence Bartolomeu Dias reached the Cape of Good Hope and entered the Indian Ocean in 1488. Ten years later, in 1498, Vasco da Gama led the first fleet around Africa to the Indian subcontinent, arriving in Calicut and starting a maritime route from Portugal to India. Portuguese explorations then proceeded to southeast Asia, where they reached Japan in 1542, forty-four years after their first arrival in India. In 1500, the Portuguese nobleman Pedro Álvares Cabral became the first European to discover Brazil.

Pedro Álvares Cabral (European Portuguese: [ˈpeðɾu ˈalvɐɾɨʃ kɐˈβɾal]; born Pedro Álvares de Gouveia; c. 1467 or 1468 – c. 1520) was a Portuguese nobleman, military commander, navigator and explorer regarded as the European discoverer of Brazil. He was the first human in history to ever be on four continents, uniting all of them in his famous voyage of 1500, where he also conducted the first substantial exploration of the northeast coast of South America and claimed it for Portugal. While details of Cabral's early life remain unclear, it is known that he came from a minor noble family and received a good education. He was appointed to head an expedition to India in 1500, following Vasco da Gama's newly opened route around Africa. The undertaking had the aim of returning with valuable spices and of establishing trade relations in India—bypassing the monopoly on the spice trade then in the hands of Arab, Turkish and Italian merchants. Although the previous expedition of Vasco da Gama to India, on its sea route, had recorded signs of land west of the southern Atlantic Ocean (in 1497), Cabral led the first known expedition to have touched four continents: Europe, Africa, America, and Asia.

His fleet of 13 ships sailed far into the western Atlantic Ocean, perhaps intentionally, and made landfall (April 1500) on what he initially assumed to be a large island. As the new land was within the Portuguese sphere according to the 1494 Treaty of Tordesillas, Cabral claimed it for the Portuguese Crown. He explored the coast, realizing that the large land mass was probably a continent, and dispatched a ship to notify King Manuel I of the new territory. The continent was South America, and the land he had claimed for Portugal later came to be known as Brazil. The fleet reprovisioned and then turned eastward to resume the journey to India.

Portuguese Mozambique (Portuguese: Moçambique Portuguesa) or Portuguese East Africa (África Oriental Portuguesa) were the common terms by which Mozambique was designated during the period in which it was a Portuguese overseas province. Portuguese Mozambique originally constituted a string of Portuguese possessions along the south-east African coast, and later became a unified province, which now forms the Republic of Mozambique.

Portuguese trading settlements—and later, territories—were formed along the coast and into the Zambezi basin from 1498 when Vasco da Gama first reached the Mozambican coast. Lourenço Marques explored the area that is now Maputo Bay in 1544. The Portuguese increased efforts for occupying the interior of the colony after the Scramble for Africa, and secured political control over most of its territory in 1918, facing the resistance of some Africans during the process.

Mozambique, officially the Republic of Mozambique, is a country located in Southeast Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west, and Eswatini and South Africa to the south and southwest. The sovereign state is separated from the Comoros, Mayotte, and Madagascar through the Mozambique Channel to the east. The capital and largest city is Maputo.

Between the 7th and 11th centuries, a series of Swahili port towns developed in the area, which contributed to the development of a distinct Swahili culture and dialect. In the late medieval period, these towns were frequented by traders from Somalia, Ethiopia, Egypt, Arabia, Persia, and India. The voyage of Vasco da Gama in 1498 marked the arrival of the Portuguese, who began a gradual process of colonisation and settlement in 1505. After over four centuries of Portuguese rule, Mozambique gained independence in 1975, becoming the People's Republic of Mozambique shortly thereafter. After only two years of independence, the country descended into an intense and protracted civil war lasting from 1977 to 1992. In 1994, Mozambique held its first multiparty elections and has since remained a relatively stable presidential republic, although it still faces a low-intensity insurgency mainly in the furthest regions from the southern capital and where Islam is dominant.

Colonial India was the part of the Indian subcontinent that was occupied by European colonial powers during and after the Age of Discovery. European power was exerted both by conquest and trade, especially in spices. The search for the wealth and prosperity of India led to the colonisation of the Americas after Christopher Columbus went to the Americas in 1492. Only a few years later, near the end of the 15th century, Portuguese sailor Vasco da Gama became the first European to re-establish direct trade links with India by being the first to arrive by circumnavigating Africa (c. 1497–1499). Having arrived in Calicut, which by then was one of the major trading ports of the eastern world, he obtained permission to trade in the city from the Saamoothiris (Zamorins). The next to arrive were the Dutch, with their main base in Ceylon. Their expansion into India was halted after their defeat in the Battle of Colachel to the Kingdom of Travancore, during the Travancore–Dutch War on the hands of Marthanda Varma.

Trading rivalries among the seafaring European powers brought other coastal powers from the empires of Europe to India. The Dutch Republic, England, France, and Denmark–Norway all established trading posts in India in the early 17th century. As the Mughal Empire disintegrated in the early 18th century, and then as the Maratha Empire became weakened after the third battle of Panipat, many relatively weak and unstable Indian states which emerged were increasingly open to manipulation by the Europeans, through dependent Indian rulers.

Explorers are listed below with their common names, countries of origin (modern and former), centuries of activity and main areas of exploration.