Aix-Marseille University (AMU; French: Aix-Marseille Université; formally incorporated as Université d'Aix-Marseille) is a public research university located in the region of Provence, southern France. It was founded in 1409 when Louis II of Anjou, Count of Provence, petitioned the Pisan Antipope Alexander V to establish the University of Provence. The university as it is today was formed by the merger of the University of Provence, the University of the Mediterranean and Paul Cézanne University. The merger became effective on 1 January 2012, resulting in the creation of the largest university in the French-speaking world, with about 74,000 students. AMU has the largest budget of any academic institution in the Francophone world, standing at €750 million.