Equatorial Guinea, officially the Republic of Equatorial Guinea, is a country in West Middle Africa, one of the smallest in continental Africa. It is bordered by Cameroon on the north, Gabon on the south and east, and the Gulf of Guinea on the west, where the islands of São Tomé and Príncipe lie to its southwest. Formerly the Spanish colony of Spanish Guinea, the country's territory (continentally known as Río Muni) includes a number of islands, including the sizable island of Bioko where the capital, Malabo (formerly Santa Isabel), is located. Its post-independence name is suggestive of its location near both the equator and the Gulf of Guinea. It is the only country in mainland Africa where Spanish is an official language, excluding the Spanish enclaves of Ceuta and Melilla, and the Sahrawi Arab Democratic Republic. ------------------------------------------------------ Equatorial Guinea is the smallest country, in terms of population, in continental Africa (Seychelles and São Tomé and Príncipe are smaller). It is also the smallest United Nations member from continental Africa, and the smallest Spanish-speaking country in the world. The discovery of sizeable oil reserves changed the history of the country in recent years.----------------------------------The first inhabitants of the continental region that is now Equatorial Guinea are believed to have been Pygmies, of whom only isolated pockets remain in northern Río Muni. Bantu migrations between the 17th and 19th centuries brought the coastal tribes and later the Fang. Elements of the latter may have generated the Bubi, who emigrated to Bioko from Cameroon and Rio Muni in several waves and succeeded former neolithic populations. The Bubi were the very first human inhabitants of Bioko Island. The Igbo people of Nigeria arrived in the 18th century. The Annobon population, native to Angola, was introduced by the Portuguese via São Tomé Island (São Tomé and Príncipe). --------------------------------------------------------- The Portuguese explorer, Fernão do Pó, seeking a route to India, is credited with having discovered the island of Bioko in 1472. He called it Formosa ("Beautiful"), but it quickly took on the name of its European discoverer. The islands of Fernando Pó and Annobón were colonized by Portugal in 1474. The Portuguese retained control until 1778, when the island, adjacent islets, and commercial rights to the mainland between the Niger and Ogoue Rivers were ceded to Spain in exchange for territory in the American continent (Treaty of El Pardo, between Queen Maria I of Portugal and King Charles III of Spain). From 1827 to 1843, Britain established a base on the island to combat the slave trade. The mainland portion, Rio Muni, became a protectorate in 1885 and a colony in 1900. Conflicting claims to the mainland were settled in 1900 by the Treaty of Paris, and periodically, the mainland territories were united administratively under Spanish rule. Between 1926 and 1959 they were united as the colony of Spanish Guinea.