Portugal, officially the Portuguese Republic, is a sovereign state located on the Iberian Peninsula in southwestern Europe. It is the westernmost country of mainland Europe, being bordered to the west and south by the Atlantic Ocean and to the north and east by Spain. The Portugal–Spain border is 1,214 kilometres (754 miles) long, making it the longest uninterrupted border within the European Union. The republic also includes the Atlantic archipelagos of the Azores and Madeira, both autonomous regions with their own regional governments.
The territory of modern Portugal has been continuously settled, invaded and fought over since prehistoric times. The Pre-Celts, Celts, Carthaginians and Romans were followed by the invasions of the Visigoths and Suebi Germanic peoples. Portugal as a country was established in the aftermath of the Christian Reconquista against the Muslim Moors who had invaded the Iberian Peninsula in 711 AD and occupied most of it. After the Battle of São Mamede, where Portuguese forces led by Afonso Henriques defeated forces led by his mother, Theresa of Portugal, the County of Portugal affirmed its sovereignty and Afonso Henriques styled himself Prince of Portugal. He would later be proclaimed King of Portugal at the Battle of Ourique in 1139 and was recognised as such by neighbouring kingdoms in 1143.
In the 15th and 16th centuries, Portugal established the first global empire, becoming one of the world's major economic, political and military powers. During this period, today referred to as the Age of Discovery, Portuguese explorers pioneered maritime exploration, notably under royal patronage of Prince Henry the Navigator and King João II, with such notable voyages as Bartolomeu Dias' sailing beyond the Cape of Good Hope (1488), Vasco da Gama's discovery of the sea route to India (1497–98) and the colonization of Brazil (1500). Portugal monopolized the spice trade during this time, and the empire expanded with military campaigns in Asia. However, events such as the destruction of Lisbon in a 1755 earthquake, the country's occupation during the Napoleonic Wars, the independence of Brazil (1822), and the Liberal Wars (1828–34), left Portugal crippled from war and diminished in its world power.
After the 1910 revolution deposed the monarchy, the democratic but unstable Portuguese First Republic was established, later being superseded by the Estado Novo right-wing authoritarian regime. Democracy was restored after the Portuguese Colonial War and the Carnation Revolution in 1974. Shortly after, independence was granted to almost all its overseas territories. The handover of Macau to China in 1999 marked the end of the longest-lived colonial empire. Portugal has left a profound cultural and architectural influence across the globe and a legacy of over 250 million Portuguese speakers today.
Portugal is a developed country with a high-income advanced economy and high living standards. It is the 3rd most peaceful country in the world and is one of the fifteen sustainable states, maintaining a unitary semi-presidential republican form of government. A founding member of NATO and the Community of Portuguese Language Countries, it is also a member of numerous other international organizations, including the United Nations, the European Union, the eurozone, and the OECD.