What does interfaith dialogue mean in Rome, as opposed to anywhere else? This ethnography of Roman interreligious dialogue narrates how interfaith engagement and social transformation are talked about and practiced today in the Eternal City. The constellation of Roman interfaith organizations is analyzed in a Durkheimian framework as a moral community with distinct rituals and sacred objects, referred to as the "interfaith society". Through in-depth participant-observation and interviews with interfaith dialoguers on the institutional, nonprofit, and grassroots levels, this research explores the community dynamics and social impact of pursuing religious pluralism in the shadow of the Vatican.