Focusing on Jewishness, which is placed at the intersection of race, ethnicity, nationality and religion, the article provides a case study of the complexity of legally validated ethno-racial classifications. The case of the Jewry is chosen due to its peculiar history and contemporary experience of persecution and discrimination, the myth, and the challenging legal concept of assimilation, and the unique case of Israel, the ‘official national homeland’ of the Jewry offering an official definition, which may also serve as a reference point for the Diaspora.