Portugal–Spain border Portugal–Spain border The Portugal–Spain border is the international boundary between Portugal and Spain. Referred to as "la Raya" in Spanish and "A Raia" in Portuguese (the stripe), the current demarcation is almost identical to that defined in 1297 by the Treaty of Alcañices. It is one of the oldest borders in the world. The Portugal–Spain border is 1,214 km (754 miles) long and considered the longest uninterrupted border within the European Union. The border is not defined for 18 km (11 miles) between the Caia river and Ribeira de Cuncos, because of the disputed status of Olivenza, which has been
History of Portugal 2014. Later Neanderthals roamed the northern Iberian peninsula and a tooth has been found at Nova da Columbeira cave in Estremadura. Homo sapiens sapiens arrived in Portugal around 35,000 years ago and spread rapidly throughout the country. Pre-Celtic tribes inhabited Portugal leaving a remarkable cultural footprint. The Cynetes developed a written language, leaving many stelae, which are mainly found in the south of Portugal. Early in the first millennium BC, several waves of Celts invaded Portugal from Central Europe and intermarried with the local populations to form several different ethnic groups, with many tribes. The Celtic presence in Portugal is