In Libya there are currently 106 districts, second level administrative subdivisions known in Arabic as baladiyat (singular baladiyah). The number has varied since 2013 between 99 and 108. The first level administrative divisions in Libya are currently the governorates (muhafazat), which have yet to be formally deliniated, but which were originally tripartite as: Tripolitania in the northwest, Cyrenaica in the east, and Fezzan in the southwest; and later divided into ten governorates. For historical evolution see also: Subdivisions of Libya.