As of 2010, the city of Montevideo has been divided into 8 political municipalities (Municipios), referred to with the letters from A to G, including CH, each presided over by a mayor elected by the citizens registered in the constituency. This division, according to the Municipality of Montevideo, "aims to advance political and administrative decentralization in the department of Montevideo, with the aim of deepening the democratic participation of citizens in governance." The head of each Municipio is called an alcalde or (if female) alcaldesa.
Of much greater importance is the division of the city into 62 barrios: neighbourhoods or wards. Many of the city's barrios such as Sayago, Ituzaingó and Pocitos were previously geographically separate settlements, later absorbed by the growth of the city. Others grew up around certain industrial sites, including the salt-curing works of Villa del Cerro and the tanneries in Nuevo París. Each barrio has its own identity, geographic location and socio-cultural activities. A neighbourhood of great significance is Ciudad Vieja, that was surrounded by a protective wall until 1829. This area contains most important buildings of the colonial era and early decades of independence.
