According to Sayad (2002), migrations play a 'mirror function', i.e. they allow us to refocus on issues that are already present in immigrant societies but have been overlooked in scien-tific-political analysis and debate. This also happens in the research on the relationship be-tween young people and the sacred. The becoming young and adult of the children of im-migration and the definition of their identities, including the religious one, have given rise to a flourishing season of studies on how religious sentiment is expressed in private and public space among those who are - for their own or their family's biography - an expres-sion of multicultural Italy. The contribution introduces the theme of the monographic sec-tion by recalling how from a season of scarce attention, whether and how the youth seg-ment of the population relates to aspects of religiosity has become the object of investiga-tion and analysis. The emergence of Italy as a country of immigration and the comparison with growing communities of Muslims has then added a specific lens dedicated to the dy-namics and processes of socialization, interiorization, management and visibility of being Muslim
