According to legend, Seville was founded by Hercules. It was known as ''Hispalis'' under the Romans, and ''Ishbiliya'' (????????) during the Moorish occupation. The high point in its history was following the discovery of America. The city is situated on the banks of the smooth, slow Guadalquivir River, which divides the city into two halves: ''Sevilla'' and ''Triana''. The river head is located much further West, and its basin is very large. The river mouth is located in Sanlúcar de Barrameda and crosses the Doñana National Park (one of the most important wetlands in Europe, breeding ground to many species of birds). The Guadalquivir (known as ''Betis'' by the Romans and as ''Betik Wahd-Al-Khabir'' by the Arabs) has had a major impact in the history of the city. The location of Sevilla is roughly coincident with the point where the Guadalquivir stops being useful for navigation. It is at this point that the cereal producing region of the Guadalquivir Valley starts, and Sevilla has acted as a sea-port for commerce of agricultural goods produced further West. Intense trade existed in the area from Roman times, continued under Muslim rule, and exploded as Seville monopolized the new trade with the Americas. As the monopoly was broken (Cádiz largely took Seville's place), the city entered a period of relative decline.Seville has played host to two international exhibitions - the Ibero-American Exhibition in 1929 and the International Exposition in 1992.Inhabitants of the city are known as ''Sevillanos''. http://wikitravel.org/en/Seville