Aix-en-Provence (French pronunciation: [ɛksɑ̃pʀovɑ̃s]; Provençal Occitan: Ais de Provença in classical norm, or Ais de Prouvènço in Mistralian norm, pronounced [ˈajz de pʀuˈvɛⁿsɔ]), or simply Aix (pronounced: [ɛks]; medieval Occitan Aics), is a city-commune in southern France, some 30 km (19 mi) north of Marseille. It is in the region of Provence-Alpes-Côte d'Azur, in the département of Bouches-du-Rhône, of which it is a subprefecture. The population of Aix is approximately 143,000. Its inhabitants are called Aixois or, less commonly, Aquisextains.