La Paz, officially known as Nuestra Señora de La Paz, is one of the capitals of Bolivia and is the seat of government of the Plurinational State of Bolivia. With an estimated 816,044 residents as of 2020, La Paz is the third-most populous city in Bolivia. Its metropolitan area, which is formed by La Paz, El Alto, Achocalla, Viacha, and Mecapaca makes up the second most populous urban area in Bolivia, with a population of 2.0 million, after Santa Cruz de la Sierra with a population of 2.3 million. It is also the capital of the La Paz Department.
The city, in west-central Bolivia southeast of Lake Titicaca, is set in a canyon created by the Choqueyapu River. It is in a bowl-like depression, part of the Amazon basin, surrounded by the high mountains of the Altiplano. Overlooking the city is the towering, triple-peaked Illimani. Its peaks are always snow-covered and can be seen from many parts of the city. At an elevation of roughly above sea level, La Paz is the highest capital city in the world. Due to its altitude, La Paz has an unusual subtropical highland climate, with rainy summers and dry winters.
La Paz was founded on 20 October 1548, by the Spanish conquistador Captain Alonso de Mendoza, at the site of the Inca settlement of Laja as a connecting point between the commercial routes that led from Potosí and Oruro to Lima; the full name of the city was originally Nuestra Señora de La Paz (meaning Our Lady of Peace) in commemoration of the restoration of peace following the insurrection of Gonzalo Pizarro and fellow conquistadors against the first viceroy of Peru. The city was later moved to its present location in the valley of Chuquiago Marka. La Paz was under Spanish colonial rule as part of the Viceroyalty of the Río de la Plata, before Bolivia gained independence. Since its founding, the city was the site of numerous revolts. In 1781, the indigenous leader and independence activist Túpac Katari laid siege to the city for a total of six months, but was finally defeated.