Abstract: When is a church a church? What makes a church a denomination? What makes a denomination an institution? And what constitutes that institution: people, the law, money, divine approval, or something else? In asking questions such as these, Handman, Opas, Hardin, and MacLochlainn usefully address denominational forms as institutions, which has long been a sociological concern—most especially in the work of Goffman (1961)—but has arguably received comparatively little attention within the anthropology of Christianity. Taken together, then, the articles in this collection address not just questions about form and function, but also questions about how the self becomes built into structures that regard rules and norms as an important, even sacred expression of Christian life and truth.