Portuguese Republic (Portuguese: República Portuguesa), is a country located in Southwestern Europe, on the Iberian Peninsula. It is the westernmost country of mainland Europe, and is bordered by the Atlantic Ocean to the west and south and by Spain to the north and east. Apart from continental Portugal, the Portuguese Republic holds sovereignty over the Atlantic archipelagos of Azores and Madeira, which are autonomous regions of Portugal. The country is named after its second largest city, Porto, whose Latin name was Portus Cale. The land within the borders of the current Portuguese Republic has been continuously fought over and settled since prehistoric times. After a period of Roman rule followed by Visigothic and Suebian domination, in the 8th century most of the Iberian Peninsula was conquered by Moorish invaders professing Islam, who were later expelled by the Knights Templar. During the Christian Reconquista, Portugal established itself as an independent kingdom from Galicia in 1139, making it 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 the first global empire, becoming one of the world's major economic, political and military powers.