 The permanent staff of CORE is generally constituted of some 40 faculty members coming from UCLouvain, other Belgian and some neighbouring foreign universities (Katholieke Universiteit Leuven, Université libre de Bruxelles, Université Saint-Louis - Bruxelles, Université de Liège, Université de Mons, Université de Namur, Universiteit Maastricht, Université de Lille and Université du Luxembourg), as well as of several administrative employees.Yearly, the center hosts an average of 25 researchers coming to CORE on long-term visits, including two categories of external visitors