The medieval theory of the caliphate, epitomized by the Abbasids (750–1258), was the construct of jurists who conceived it as a contractual leadership of the Muslim community in succession to the Prophet Muhammed’s political authority. In this book, Huseyin Yilmaz traces how a new conception of the caliphate emerged under the Ottomans, who redefined the caliph as at once a ruler, a spiritual guide, and a lawmaker corresponding to the prophet’s three natures.