Provinces of Argentina became provinces in 1951. Misiones did so in 1953, and Formosa, Neuquén, Río Negro, Chubut and Santa Cruz, in 1955. The last national territory, Tierra del Fuego, became the Tierra del Fuego, Antártida e Islas del Atlántico Sur Province in 1990. Argentina is a federation of twenty-three provinces and one autonomous city, Buenos Aires. Provinces are divided for administration purposes into departments and municipalities, except for Buenos Aires Province, which is divided into partidos and "localidades". Buenos Aires City itself is divided into communes ("comuna") and non-official neighbourhoods ("barrios"). Provinces hold all the power that they chose not to delegate
Provinces of Peru country. The province with the fewest districts is Purús Province, with just one district. The province with the most districts is Lima Province, with 43 districts. The most common number of districts per province is eight, a total of 29 provinces share this number of districts. The table below shows all provinces with their capitals and the region in which they are located. The UBIGEO code uniquely identifies each province. Capitals in bold are also a regional capital. Provinces in which the region's capital is located all have an UBIGEO code ending in codice_1. Provinces of Peru The provinces of