The new system, which dispenses with the office of prime minister, was agreed in a bitterly-fought 2017 referendum narrowly won by the "Yes" camp. The issue continues to polarise public opinion in Turkey."A partisan one-man regime starts officially today," said the opposition Cumhuriyet newspaper.But the pro-government daily Yeni Safak hailed it as an "historic day", saying: "One page is closing in Turkish history and a new page is opening download finance app."The president now sits at the top of a vertical power structure marked by a slimmed-down government with 16 ministries instead of 26 and multiple bodies reporting to him.In one of the most significant changes, the EU affairs ministry, set up in 2011 to oversee Turkey's faltering bid to join the bloc, is being subsumed into the foreign ministry.Prime Minister Binali Yildirim now goes down in history as the 27th and final holder of the post in Turkey. He is expected to become speaker of the new parliament.