The following article describes the history of the Azores, an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atlantic Ocean, about west of Lisbon, about northwest of Morocco, and about southeast of Newfoundland, Canada.

Myth and legend

Stories of islands in the Atlantic Ocean, legendary and otherwise, had been reported since classical antiquity.Beazley (1897–1906, 1899:p. lxxii.) Utopian tales of the Fortunate Isles (or Isles of the Blest) were sung by the poets Homer, Horace, and Pindar. Plato articulated the legend of Atlantis. Ancient writers such as Plutarch, Strabo and, more explicitly, Pliny the Elder and Ptolemy, testified to the real existence of the Canary Islands.

The Middle Ages saw the emergence of a new set of legends about islands deep in the Atlantic Ocean. These were sourced in various places, e.g. the Irish immrama, or missionary sailing voyages (such as the tales of Ui Corra and Saint BrendanBabcock (1922: Ch. 3).) and the sagas of Norse adventurers (such as the Grœnlendinga saga and the saga of Erik the Red). The peoples of the Iberian Peninsula, who were closest to the real Atlantic islands, and whose seafarers and fisherman may have seen and even visited them,Already both Plutarch (Life of Sertorius) and Pliny the Elder report that fishermen from Gades (Cádiz) routinely visited Atlantic islands to the southwest. articulated their own tales. Medieval Andalusian Arabs related stories of Atlantic island encounters in the legend of the 9th-century navigator Khashkhash of Cordoba (told by al-Masudi)Beazley (1897: vol.1, p. 465.) and the 12th-century story of the eight Maghurin (Wanderers) of Lisbon (told by Muhammad al-Idrisi).Beazley (1906: vol. 3, p. 532). Cortesão (1954 (1975))-

From these Greek, Irish, Norse, Arab and Iberian seafaring tales – often cross-fertilizing one another – emerged a myriad of mythical islands in the Atlantic Ocean – Atlantis, the Fortunate Islands, Saint Brendan's Island, Brasil Island, Antillia (or Sete Cidades, the island of the Seven Cities), Satanazes, the Ilhas Azuis (Blue Islands), the Terra dos Bacalhaus (Land of Codfish), and so on, which, however uncertain, became so ubiquitous that they were considered fact.

According to Bartolomé de las Casas, two dead bodies that looked like those of Amerindians were found on Flores. He said he found that fact in Christopher Columbus's notes, and that it was one reason why Columbus presumed that India was on the other side of the ocean.De Las Casas, Bartolomé; Pagden, Anthony (8 September 1999). A Short Account of the Destruction of the Indias. New York: Penguin Books. .

In A History of the Azores (1813), by Thomas Ashe, the author talks of the discovery of the islands by Joshua Vander Berg of Bruges, who landed there during a storm on his way to Lisbon. This claim is generally discredited among academics today. So were local stories of a mysterious equestrian statue and coins with Carthaginian writing that were purportedly discovered on the island of Corvo, or the strange inscriptions found along the coast of Quatro Ribeiras (on Terceira): all unsubstantiated stories that supported the claims of human visitation to the islands before the official record.

But the Medici maps of 1351 depicted seven islands off the Portuguese coast, which were arranged in groups of three: the southern group, or the Goat Islands (Cabreras), the middle group, or the Wind or Dove Islands (De Ventura Sive de Columbis), and the western group, including Brazil Island (De Brazil). The Catalan Atlas (1375) also identifies three islands with the names of Corvo, Flores, and São Jorge, and it was thought that maybe the Genovese had discovered the Azores, and given them those names. But, generally, these stories highlighted that sightings were being made at the end of the 14th century, or, at least, that the peoples of Europe had a passing knowledge of islands in the Atlantic.

Hypogea There have been recent discoveries (2010–2011) of hypogea (structures carved into embankments, that may have been used for burials) on the islands of Corvo, Santa Maria and Terceira, that might allude to a human presence on the islands before the Portuguese.These archaeological sites were first identified by Nuno Ribeiro (in 2010) during archeological visits to Corvo and Terceira, but further examination and dating were required to authenticate their validity. Until recently there was no clear evidence that there were, in fact, other inhabitants on the islands, and archaeological investigations are only now commencing as to the age and relevance of these structures.

Vikings Although it was traditionally believed that Portuguese explorers were the first humans to arrive on the Azores, there is evidence to suggest otherwise. In particular, researchers have discovered that 5-beta-stigmasterol is present in sediment samples from between 700 and 850 CE. This compound is found in the feces of livestock, such as sheep and cattle, neither of which are native to the islands. The researchers also found evidence of fires from this period being used to clear land for livestock. They also discovered non-native ryegrass in the Azores. Additionally, mice on the Azores were discovered to have mitochondrial DNA suggesting they first arrived from Northern Europe, suggesting that they were brought to the islands by Norwegian Vikings.

However, geographer Simon Connor comments that a Viking settlement is not certain: "Thanks to widespread trade routes, a mouse from Scandinavia could easily have boarded a ship in what today is Portugal and sailed over to the Azores."

Exploration

Early appearance on charts

The Azores archipelago began to appear on portolan charts during the 14th century, well before its official discovery date. The first map to depict the Azores was the Medici Atlas (1351). Its depiction was subsequently replicated in the Pizzigani brothers' map of 1367, the Catalan Atlas (1375), the Pinelli–Walckenaer Atlas (1384), the Corbitis Atlas (c. 1385–1410), the charts of Guillem Soler (1380, 1385), Mecia de Viladestes (1413) and others.Amat di S. Filippo (1892: p. 534.); Mees (1901: p. 140.) Marcel (1887: p. 31.) suggests it may have already been hinted at in the Angelino Dulcert (1339) map, under the names St. Brendan, Primaria sive puellarum, Capraria and Canaria. They are also listed in the Libro del Conoscimiento (c. 1380).Libro de Conoscimiento (1877 ed.: p. 50.)

In these maps, the Azores are usually depicted vertically aligned, on a north–south axis, nine islands in three clusters. The island names, in order (from south to north) are usually (with their tentative translation):

bottom cluster: lovo or lobo ("island of wolves" (seals?), Santa Maria) caprara or cabrera ("island of goats", São Miguel), middle cluster: y de brazil ("island of embers/fire", Terceira) li columbi ("island of pigeons", Pico) y de la ventura ("island of venture/winds", Faial) san zorzo ("island of St. George", São Jorge) top cluster: li conigi ("island of rabbits", Flores) y de corvis marinis ("island of sea crows", Corvo)

It is notable that two of the names – San Zorzo and Corvis Marinis – would be transferred to the modern Azorean islands. Only Graciosa seems to be routinely missing on these maps. The Madeira archipelago also appears on most of these same maps, with their modern names: legname (Ligurian for "wood", Madeira), porto sancto (Porto Santo), desertas (Desertas) and salvazes (Savage Island).

The source of this information is a mystery. It could simply be derived from pure legend, possibly of Andalusian Arab origin e.g. al-Idrisi speaks of an Atlantic island of wild goats (the Caprera?) and another of "cormorants", a scavenger bird (the "sea crows" of Corvis Marinis?)Babcock, p. 166. But outside their erroneous axial tilt, the Azores do seem clustered with reasonable accuracy. From this cartographic record, there seems little doubt that both Madeira and the Azores were discovered, or at least sighted, during the 14th century, well before their official discovery dates.Cortesão (1954 (1975): p. 82.); Cortesão (1969: p. 67.)

One hypothesis is that the Azores were discovered in the course of a mapping expedition in 1341 to the Canary Islands, sponsored by King Afonso IV of Portugal, and commanded by the Florentine Angiolino del Tegghia de Corbizzi and the Genoese Nicoloso da Recco.The 1341 expedition is related by Giovanni Boccaccio "De Canaria et insula reliquis, ultra Ispaniam, in occeano noviter repertis" (repr. in Monumenta Henricina, vol. I, pp. 202–06.) Although not quite described in the 1341 report, Madeira and the Azores might nonetheless have been seen from a distance on the expedition's return via a long sailing arc (volta do mar) from the Canary islands.De la Roncière (1925: p. 4ff.); Magalhães Godinho (1962: p. 30); Cortesão (1954 (1975):pp. 90–91.)

Even if they were not discovered by the mapping expedition of 1341 itself, the islands may have been found by any of the numerous Majorcan expeditions that were launched into the Atlantic Ocean in the aftermath, destined for slaving runs on the newly mapped Canary islands.Fernández-Armesto (2007). Regardless of whether they were sighted during the 14th century, there seems to have been no follow-ons until the 15th century.

Portuguese exploration

In the late 14th century, many maps appeared showing fictitious islands in the Atlantic. In this period, expanding commercial contacts linked the Mediterranean with communities along the Atlantic coast. In particular, Genoese, Florentine, and Venetian traders were active, and also religious groups seeking converts to Christianity. This expansion placed the Kingdom of Portugal in a strategic position. The seafaring Portuguese were eager to expand their realm and their influence.

In this context, Prince Henry the Navigator (1394–1460) had an important role. He added his own financial support to the efforts of the Portuguese crown and financed the construction of new ships, establishing naval schools to harness seafaring knowledge and promoting new technologies and their use. Prince Henry is generally credited with motivating modern navigation and directing discoveries during the age of exploration.

Prince Henry hoped to establish communication by sea with India and the legendary realm of Prester John, thereby outflanking the hostile Muslim states in northern Africa and the Holy Land. He was Grand Master of the Military Order of Christ, whose program of exploration, discovery, and settlement was tailored for this dual purpose.

Prince Henry experimented with ships, navigational instruments, and maps, developing techniques that made oceanic travel possible. The Portuguese Atlantic islands were not unknown; a growing body of documents had shown that sailors were aware of the islands. But most important, in the words of Prince Henry's personal chronicler, is that the Prince "ordered [Portuguese navigators and captains] to find the islands", rather than just sending his fleets into the unknown to discover what they could.

The re-discovery The exact date of this re-discovery of the Atlantic islands is not clear, though historical accounts indicate that the islands of Santa Maria and São Miguel were the first to be discovered by navigator Diogo de Silves around 1427.