This article examines the production of religious authority among the Süleymanlı, a branch of the Naqshibandiyya order, which is the largest Sufi community active among Turkish-origin Muslims in Europe. Like other Islamic organizations, the Süleymanlı claims to represent "true Islam," which they construct during their central communal ritual, hatim, in which religious knowledge is produced and disseminated. The interaction of a religious corpus of assertions, media of representation, and social organization during this ritual produces its "criteria of Islamic validity and priority" which authorizes mystical Islam. European adaptations of the Islamic tradition require an analysis of how Islam is authorized rather than simply what "European Islam" is or who speaks on behalf of it, individually or communally.