In this contribution the focus is on nationalism, i.e. the view that one’s own country and people are unique and superior, implying a negative comparison with regard to other national groups and countries. The research questions we set out to answer are: (1) what are the cross-national differences and trends in nationalism across Europe? (2) Which individual and national characteristics can explain these differences and changes in nationalism in European countries? We use high-quality cross-national data from 20 countries from the ‘National Identity’ modules of the International Social Survey Programme, collected in 1995, 2003 and 2013. Considerable differences between countries were found; however, within countries the level of nationalism remained rather stable over the period from 1995 to 2013.