This article examines modernist-nationalist thought on Sufi lodges during the late Ottoman Empire and early Turkish Republic via the controversial novel Nur Baba (1922) by Yakup Kadri Karaosmanoğlu. Widely translated and the basis of the first-ever Turkish motion picture, Nur Baba depicts a debauched Sufi lodge in turn-of-the-century Istanbul where drug use, alcoholism, and illicit amorous liaisons run amok. The novel played an important role in shaping public perceptions of Sufi lodges in the twilight years of the Ottoman Empire. This piece explores the novel's place among early 20th-century critiques of Sufism, its approach to national history, its historical setting (during the reign of Sultan Abdülhamid II), and its close relationship to the intellectual concerns of the Second Constitutional Period (1908–18). It argues for a revised understanding of the novel's historical setting and contends that the novel employs a combination of moralistic critique and romantic nostalgia that is central to modernist-nationalist treatments of Sufism that instrumentalize Sufi culture for nation-building purposes.