Filep presents an ongoing research project, which explores the geographies of mobilization for political self-determination in Europe. More precisely, it investigates the domestic and transnational activism of secessionist and autonomy movements. In this context the project addresses two recent phenomena that indicate a diversification of spaces of mobilization. Firstly, it examines the emergence of new civil society organizations such as the Catalan National Assembly or the Szekler National Council as powerful alternatives or complements to political parties at the domestic level and as major drivers in the mobilization for self-determination. Secondly, it studies the increasing transnational activism of movements and the reasons underlying this shift in strategy.