page_title: Portuguese Empire
section_title: Initial African coastline excursions
hierarchical_section_title: Portuguese Empire / History / First era (1415–1663) / Initial African coastline excursions
caption_attribution_description: English: Areas claimed or part of the Portuguese Empire from 1415 to 1999
context_page_description: The Portuguese Empire, also known as the Portuguese Overseas or the Portuguese Colonial Empire, was composed of the overseas colonies and territories governed by Portugal. It was the first global empire in history and one of the longest-lived empires. It existed for almost six centuries, from the capture of Ceuta in 1415, to the handover of Portuguese Macau to China in 1999. The empire began in the 15th century, and from the early 16th century it stretched across the globe, with bases in North and South America, Africa, and various regions of Asia and Oceania.
  The Portuguese Empire originated at the beginning of the Age of Discovery, and 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 1418–19, 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 in 1498 Vasco da Gama reached India.
context_section_description: Fears of what lay beyond Cape Bojador, and whether it was possible to return once it was passed, were assuaged in 1434 when it was rounded by one of Infante Henry's captains, Gil Eanes. Once this psychological barrier had been crossed, it became easier to probe further along the coast. In 1443 Infante Dom Pedro, Henry's brother and by then regent of the Kingdom, granted him the monopoly of navigation, war and trade in the lands south of Cape Bojador. Later this monopoly would be enforced by the papal bulls Dum Diversas (1452) and Romanus Pontifex (1455), granting Portugal the trade monopoly for the newly discovered lands. A major advance that accelerated this project was the introduction of the caravel in the mid-15th century, a ship that could be sailed closer to the wind than any other in operation in Europe at the time. Using this new maritime technology, Portuguese navigators reached ever more southerly latitudes, advancing at an average rate of one degree a year. Senegal and Cape Verde Peninsula were reached in 1445.
  The first feitoria trade post overseas was established in 1445 on the island of Arguin, off the coast of Mauritania, to attract Muslim traders and monopolize the business in the routes travelled in North Africa. In 1446, Álvaro Fernandes pushed on almost as far as present-day Sierra Leone, and the Gulf of Guinea was reached in the 1460s. The Cape Verde Islands were discovered in 1456 and settled in 1462.
  Expansion of sugarcane in Madeira started in 1455, using advisers from Sicily and (largely) Genoese capital to produce the "sweet salt" rare in Europe. Already cultivated in Algarve, the accessibility of Madeira attracted Genoese and Flemish traders keen to bypass Venetian monopolies. Slaves were used, and the proportion of imported slaves in Madeira reached 10% of the total population by the 16th century. By 1480 Antwerp had some seventy ships engaged in the Madeira sugar trade, with the refining and distribution concentrated in Antwerp. By the 1490s Madeira had overtaken Cyprus as a producer of sugar. The success of sugar merchants such as Bartolomeo Marchionni would propel the investment in future travels.
  In 1469, after prince Henry's death and as a result of meagre returns of the African explorations, King Afonso V granted the monopoly of trade in part of the Gulf of Guinea to merchant Fernão Gomes. Gomes, who had to explore 100 miles (160 km) of the coast each year for five years, discovered the islands of the Gulf of Guinea, including São Tomé and Príncipe and found a thriving alluvial gold trade among the natives and visiting Arab and Berber traders at the port then named Mina (the mine), where he established a trading post. Trade between Elmina and Portugal grew throughout a decade. During the War of the Castilian Succession, a large Castilian fleet attempted to wrest control of this lucrative trade, but were decisively defeated in the 1478 Battle of Guinea, which firmly established an exclusive Portuguese control. In 1481, the recently crowned João II decided to build São Jorge da Mina in order to ensure the protection of this trade, which was held again as a royal monopoly. The Equator was crossed by navigators sponsored by Fernão Gomes in 1473 and the Congo River by Diogo Cão in 1482. It was during this expedition that the Portuguese first encountered the Kingdom of Kongo, with which it soon developed a rapport. During his 1485–86 expedition, Cão continued to Cape Cross, in present-day Namibia, near the Tropic of Capricorn.
  In 1488, Bartolomeu Dias rounded the Cape of Good Hope on the southern tip of Africa, proving false the view that had existed since Ptolemy that the Indian Ocean was land-locked. Simultaneously Pêro da Covilhã, traveling secretly overland, had reached Ethiopia, suggesting that a sea route to the Indies would soon be forthcoming.
  As the Portuguese explored the coastlines of Africa, they left behind a series of padrões, stone crosses engraved with the Portuguese coat of arms marking their claims, and built forts and trading posts. From these bases, they engaged profitably i
caption: Portuguese treatys _Alcaçovas 1471, Tordesilhas 1494, Zaragoza 1527. Yellow_ allied territories , claimed territories or under Influence. Blue_ Portuguese "Mare Clasum".
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