The main aim of this article is to discuss both the concept of secularism among the Ottoman intellectuals and the principle of secularism during the period of the Turkish Republic based on ideas rather than practice. We can analyze “secularism in Turkey” in two separate periods of time: First, “The Ottoman Empire and Secularism” which discusses the ideas of secularism before the foundation of the Turkish Republic, and second “A Brief Analysis of the Turkish Republic and the Principle of Secularism” (...) in which the idea of secularism related to the ideology of the state in the course of the Turkish Republic are shortly examined. In this article, we generally state the consistent development of secularism practiced in Turkey. (shrink)