Hans-Jörg Trenz is Professor in Modern European Studies in the Department of Media, Cognition and Communication in the Faculty of Humanities of the University of Copenhagen and Adjunct Professor at ARENA, the Centre of European Studies of the University of Oslo. He is also Deputy Director of CEMES, Centre for Modern European Studies at the University of Copenhagen and coordinates WP3 of the EuroChallenge project. Hans-Jörg obtained his habilitation from the Humboldt University in Berlin (2004) and his PhD in Social and Political Sciences from the European University Institute in Florence (1998, with the dissertation on mobilising collective identities: public discourse on immigration in Germany and Portugal). He studied sociology, criminology, romance languages and literature at the University of Saarland, Germany, University of Bari, Italy and Central University of Barcelona, Spain and obtained his degree in 1993. His research focusses on the European public sphere, European civil society, citizenship and democracy and transnational mobilisation and protest. He has authored and edited seven books and published more than 60 articles. The large part of his publications deals with aspects of media and political communication in Europe, applying a public sphere perspective to the process of European integration and analysing both print and new media. His writings also address questions of language, ethnicity, collective identity, civil society and democracy.