This forum develops within the European Research Council's Cultural Expertise in Europe: What is it useful for? (EURO-EXPERT) project. EURO-EXPERT aims to reformulate the emergent notion of cultural expertise as a concept that might extensively account for the use of social sciences in dispute resolution and in connection with rights claims. A threshold definition of cultural expertise was formulated as "the special knowledge that enables socio-legal scholars, or, more generally speaking, cultural mediators-the so-called cultural brokers-, to locate and describe relevant facts in light of the particular background of claimants and litigants and for the use of the court". 1 However, this definition is too restrictive because it does not account for the broader range of out-of-court procedures in which social sciences knowledge is applied to the resolution of conflicts, litigation, and the formulation of rights. EURO-EXPERT argues that a strictly legal approach to cultural expert witnessing undermines the array of socio-legal instruments that could be better appraised with the help of a broad concept of cultural expertise. Hence, the need for an integrated definition of cultural expertise that covers the larger range of phenomena explored throughout socio-legal studies. 2