Bulgaria is historically a multicultural society with established ethnic minorities and, in the post-communist era, increasing immigration. The prevailing social inequalities between the majority and ethnic and immigrant minorities as well as the regional differences in intergroup configurations call for research uncovering the construction and consequences of detrimental interethnic attitudes. The general aim of this project is to deepen the understanding of social psychological processes underlying interethnuage_1nic attitudes and prejudice of both the Bulgarian majority and of the two major ethnic minorities (Roma and Turks) in contemporary Bulgaria. Our research team located at the University of Lausanne and the Bulgarian Academy of Sciences examines the views of the Bulgarian majority and the two largest minorities on their relationship between each other as well as their views on new minorities, that is, different immigrant groups.