City (pop., 2002 est.: 262,000) and port, central Chile.
It was founded by the Spanish in 1536; few of its colonial buildings have survived a succession of pirate raids, storms, fires, floods, and earthquakes. After Chilean independence in 1818, the city's port developed with the growth of the Chilean navy. In 1884 a treaty was signed there by which Bolivia ceded to Chile a coastal region containing principal nitrate deposits (see War of the Pacific ). As Chile's principal seaport, it handles the bulk of the country's imports, and it is still a naval facility. It also produces chemicals and textiles. Chile's bicameral parliament, the National Congress, has been situated there since it was reestablished in 1990.