Lima /ˈliːmə/ is the capital and the largest city of Peru. It is located in the valleys of the Chillón, Rímac and Lurín rivers, in the central coastal part of the country, overlooking the Pacific Ocean. Together with the seaport of Callao, it forms a contiguous urban area known as the Lima Metropolitan Area. With a population approaching 9 million, Lima is the most populous metropolitan area of Peru, and the fifth largest city in the Americas (as defined by "city proper").Lima was founded by Spanish conquistador Francisco Pizarro on January 18, 1535, as Ciudad de los Reyes. It became the capital and most important city in the Spanish Viceroyalty of Peru.