The land within the borders of today's Portuguese Republic has been continuously settled since prehistoric times: occupied by Celts like the Gallaeci and the Lusitanians, integrated into the Roman Republic and later settled by Germanic peoples such as the Suebi and the Visigoths, in the 8th century the lands were conquered by Moors. During the Christian Reconquista, Portugal established itself as an independent kingdom from León, claiming to be the oldest European nation-state.
In the 15th and 16th centuries, as the result of pioneering the Age of Discovery, Portugal expanded western influence and established a global empire that included possessions in Africa, Asia, Oceania, and South America, becoming one of the world's major economic, political and military powers. The Portuguese Empire was the first transoceanic empire in history, and also the longest lived of the European colonial empires. However, the country's international status was greatly reduced during the 19th century, especially following the independence of Brazil, its largest colony.
After the 1910 revolution deposed the monarchy, the democratic but unstable Portuguese First Republic was established being then superseded by the "Estado Novo" fascist regime. Democracy was restored after the Portuguese Colonial War and the Carnation Revolution in 1974, after which Portugal's last overseas provinces became independent (most prominently Angola and Mozambique); the last overseas territory, Macau, was ceded to China in 1999.
Portugal is a developed country with an advanced and high-income economy, with a very high Human Development Index. It has the world's 19th-highest quality-of-life, one of the top health care systems, and it's also one of the world's most globalized and peaceful nations. A member of the European Union and the United Nations, it is as well a founding member of the Latin Union, the Organization of Ibero-American States, OECD, NATO, Community of Portuguese Language Countries, the Eurozone and the Schengen Agreement.