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 of more than 10 million, Lima is the most populous metropolitan area of Peru and the third-largest city in the Americas (as defined by "city proper"), behind São Paulo, and Mexico City. 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. Following the Peruvian War of Independence, it became the capital of the Republic of Peru. Around one-third of the national population lives in the metropolitan area. Lima is home to one of the oldest institutions of higher learning in the New World. The National University of San Marcos, founded on May 12, 1551, during the Spanish colonial regime, is the oldest continuously functioning university in the Americas. In October 2013, Lima was chosen to host the 2019 Pan American Games. It also hosted the December 2014 United Nations Climate Change Conference and the Miss Universe 1982 pageant. In October 2015, Lima hosted the 2015 Annual Meetings of the World Bank Group and the International Monetary Fund.