It is located on the shore of the Mediterranean Sea, about 120 km south of the Pyrenees mountain range and the border with France, on a small coastal plain bounded by the sea to the east, the Collserola mountain range to the west, the river Llobregat to the south and the Besós river to the north. Because it has been the capital of the county of Barcelona, ​​it is usually referred to as the antonomastic denomination of Ciudad Condal. The history of Barcelona extends over 4000 years, from the end of the Neolithic, with the first remains found in the territory of the city, to the present. The substrate of its inhabitants unites the Iberian, Roman, Jewish, Visigoth, Muslim and Christian peoples. As the capital of Catalonia and second largest city in Spain, Barcelona has forged its relevance over time, from being a small Roman colony to becoming a city valued internationally for aspects such as its economy, its artistic heritage, its culture, its sport and its social life.Barcelona has been the scene of several international events that have helped to consolidate, develop and give it worldwide exposure. The most important have been the Universal Exposition of 1888, the International Exhibition of 1929, the 1992 Olympic Games and the Universal Forum of Cultures 2004. It is also the headquarters of the Secretariat of the Union for the Mediterranean.10