The Megali Idea (Greek: Μεγάλη Ιδέα Megáli Idéa, "Great Idea") was an irredentist concept of Greek nationalism, that expressed the goal of establishing a Greek state that would encompass all ethnic Greek-inhabited areas, including the large Greek populations which, after the Greek War of Independence (1830) from the Ottoman Empire, were still under Ottoman occupation.The term appeared for the first time during the debates of Prime Minister Ioannis Kolettis with King Otto that preceded the promulgation of the 1844 constitution.