Buenos Aires is the capital, and largest city, of Argentina, currently the third-largest metropolitan area in South America, after São Paulo and Rio de Janeiro. It is located on the southern shore of the Río de la Plata, on the southeastern coast of the South American continent.
The city of Buenos Aires is not part of Buenos Aires Province, nor is it its capital; rather, it is an autonomous federal district. Greater Buenos Aires is the fourth-largest conurbation in Latin America, with a population of around 13 million.
After the internal conflicts of the 19th century, Buenos Aires was federalised and removed from Buenos Aires Province in 1880. The city limits were enlarged to include the former towns of Belgrano and Flores, which are both now neighbourhoods of the city.