On Sunday, 16 April 2017, a constitutional referendum was held, where the voters in Turkey (and Turkish citizens abroad) voted on a set of 18 proposed amendments to the Constitution of Turkey. The amendments include the replacement of the existing parliamentary system with a presidential system. The post of Prime Minister would be abolished, and the presidency would become an executive post vested with broad executive powers. Parliament would be increased from 550 seats to 600 seats. The referendum also called for changes to the Supreme Board of Judges and Prosecutors.