The role of religion in party communications has received little attention in empirical research so far. This is particularly surprising because scholars usually rely on the assumption that populist radical right parties refer to Christian values and traditions in order to defend them from foreign outgroups. This research project attempts to fill this gap by analyzing religious references of 36 political parties in seven Western European democracies (Austria, France, Germany, Great Britain, Italy, Spain and Switzerland) in order to test this assumption. In particular and among other things, it focuses on the salience of references to Christianity and Islam as well as on the type of evaluation of these religions in election manifestos and on Facebook.