The Constitution of the Republic of the Union of Myanmar (Burmese: ပြည်ထောင်စုသမ္မတမြန်မာနိုင်ငံတော် ဖွဲ့စည်းပုံအခြေခံဥပဒေ) is the supreme law of Myanmar. Myanmar's first constitution adopted by constituent assembly was enacted for the Union of Burma in 1947. After the 1962 Burmese coup d'état, a second constitution was enacted in 1974. The country has been ruled by military juntas for most of its history. The 2008 Constitution, the country's third constitution, was published in September 2008 after a referendum, and came into force on 31 January 2011.