This article focuses on the religious dimension of the Sicilian mafia. The Sicilian mafia, known as Cosa Nostra, has consistently demonstrated the capacity to combine tradition with innovation. It adapts to changing circumstances, modifying its modus operandi accordingly, while maintaining seemingly consistent ‘moral’ codes, ritual practices and a strong reified collective identity. Religion, in particular, appears to be a central component of mafia identity. Instances of this apparently paradoxical phenomenon range from the altars frequently found in the hideouts of mafiosi, to the mafia's ambiguous relationship with clergymen, and to the religious symbols utilised during the ceremony of initiation. Applying theories of ritual and performance to the study of the mafia role in religious festivals, this article examines the effects of the role played by mafiosi in local religious festivals on their individual and collective identity, as well as on the social structure of the group as a whole. Specific attention will be dedicated to how —and whether—these practices have been affected by the recent significant successes in judicial investigations into the mafia, the hardening in the civil society's attitude toward organized crime syndicates, and the progressively firmer stand by the Church against the mafia. The data for analysis are derived from judicial papers, police reports and video footage, together with relevant secondary literature on the subject.