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La Plata (Spanish pronunciation: [la ˈplata]) is the capital city of Buenos Aires Province, Argentina. According to the 2010 census [INDEC], it has a population of 765,378 and its metropolitan area has 899,523 inhabitants.La Plata was planned and developed to serve as the provincial capital after the city of Buenos Aires was federalized in 1880.

To be distinguished from the Cathedral of Sucre, Bolivia, formerly La PlataThe Cathedral of La Plata in La Plata, Argentina, dedicated to the Immaculate Conception, is the 58th tallest church in the world. This Neogothic edifice is located in the geographical center of the city, facing the central square, Plaza Moreno, and the City Hall.

The Roman Catholic Archdiocese of La Plata (erected 15 February 1897, as the Diocese of La Plata) is in Argentina and is a metropolitan diocese and its suffragan sees are Azul, Chascomús, and Mar del Plata. It was elevated on 20 April 1934.

La Plata City Hall is the executive seat of government of the city of La Plata, the capital of Buenos Aires Province, Argentina.