The Constitution of the Ottoman Empire (Ottoman Turkish: قانون أساسي, romanized: Kānûn-ı Esâsî, lit. 'Basic law'; French: Constitution ottomane) was in effect from 1876 to 1878 in a period known as the First Constitutional Era, and from 1908 to 1922 in the Second Constitutional Era. The first and only constitution of the Ottoman Empire, it was written by members of the Young Ottomans, particularly Midhat Pasha, during the reign of Sultan Abdul Hamid II (r. 1876–1909). After Abdul Hamid's political downfall in the 31 March Incident, the Constitution was amended to transfer more power from the sultan and the appointed Senate to the popularly-elected lower house: the Chamber of Deputies.
In the course of their studies in Europe, some members of the new Ottoman elite concluded that the secret of Europe's success rested not only with its technical achievements but also with its political organizations. Moreover, the process of reform itself had imbued a small segment of the elite with the belief that constitutional government would be a desirable check on autocracy and provide it with a better opportunity to influence policy. Sultan Abdulaziz's chaotic rule led to his deposition in 1876 and, after a few troubled months, to the proclamation of an Ottoman constitution that the new sultan, Abdul Hamid II, pledged to uphold.
