This chapter offers a sociological perspective on the Romanian Churches and Christian movements in Italy. Although the Italian peninsula hosts the largest Romanian immigrant group in the world, to date only one full-length research study has analyzed the religions of Romanian immigrants in Italy. First, the chapter provides an overview of the religious landscape in Italy based on quantitative data (Sect. 2). It focuses on the diversification of religion and the pluralization of Christianity due to migration in the Italian peninsula. Second, it traces Romanian immigration to Italy since the 2000s, showing the influence of linguistic, ethnic, and religious aspects on migration flows between the two countries (Sect. 3). In particular, it examines some socio-cultural and religious dynamics that shed light on the massive transnational migration from Romania to Italy. Third, it presents estimates on the Churches and Christian movements from Romania to Italy, thus depicting multifaceted nature of this immigrant Christendom (Sects. 4 and 5). It surveys all religious organizations in the Romanian immigrant group, as well as their geographical distribution among the Italian regions. Finally, it proposes a tentative typology of factors influencing the establishment of immigrant Churches and Christian movements in relation to the respective Christian majority/minority of the host country (Sect. 6). The first development of this typology is applied to the study of Romanian Christianities in Italy.