Nikola Tietze is a sociologist at the Hamburger Institut für Sozialforschung and associate researcher at the Centre d’Analyse et d’Interventions Sociologiques at the École des Hautes Études en Sciences Sociales (EHESS, Paris). Following a political science diploma at the Otto-Suhr-Institut of the Freie Universität Berlin in 1993, she completed her PhD dissertation in 1999 at the EHESS, Paris, and her habilitation at the University of Hamburg in 2013. She has taught in Bordeaux, Paris and Hamburg. Her research focuses on the sociology of Europe, immigration, and religion. She now works on the transformations linked to post-sovereign state power in Europe and the regulation of conflict practices. With Ulrike Jureit, she recently published a book entitled Postsouveräne Territorialität. Die Europäische Union und ihr Raum (2015).