after the foundation of the Serbest Fırka (Liberal Party) by Ali Fethi Okyar, again at the request of Mustafa Kemal, in 1930, some violent disorders took place, especially in the eastern parts of the country. The Liberal Party was dissolved on 17 November 1930 and no further attempt at a multiparty democracy was made until 1945. 1945–1960 The multi-party period in Turkey was resumed by the founding of the National Development Party (Milli Kalkınma Partisi), by Nuri Demirağ, in 1945. The Democrat Party was established the following year, and won the general elections of 1950; one of its leaders, Celal Bayar, becoming President of the Republic and another, Adnan Menderes, Prime Minister. 1960–1980 After the a military coup on 27 May 1960, Prime Minister Adnan Menderes, President Celal Bayar, and all the ministers and members of the Assembly were arrested. The Assembly was closed. The Committee of National Unity, CNU (Milli Birlik Komitesi), assumed all the powers of the Assembly by a provisional constitution and began to run the country. Executive power was used by ministers appointed by the CNU. The members of the CNU began to work on a new and comprehensive constitution. The Constituent Assembly (Kurucu Meclis), composed of members of the CNU and the members of the House of Representatives, was established to draft a new constitution on 6 January 1961. The House of Representatives consisted of those appointed by the CNU, representatives designated by two parties of that time (CHP and Republican Villagers National Party, RVNP), and representatives of various professional associations. The constitutional text drafted by the Constituent Assembly was presented to the voters in a referendum on 9 July 1961, and was accepted by 61.17% of the voters. The 1961 Constitution, the first prepared by a Constituent Assembly and the first to be presented to the people in a referendum, included innovations in many subjects. The 1961 Constitution stipulated a typical parliamentarian system. According to the Constitution, Parliament was bicameral. The legislative power was vested in the House of Representatives and the Senate. while the executive authority was vested in the President and the Council of Ministers. The Constitution envisaged a Constitutional Court. The 1961 Constitution regulated fundamental rights and freedom, including economic and social rights, over a wide spectrum and adopted the principles of a democratic social state and the rule of law. The 1961 Constitution underwent many comprehensive changes after the military