Under the new presidential system Erdogan will have the power to dissolve Parliament, appoint or remove vice presidents, ministers, judges and high level officials as well as issue executive decrees and lift or impose a state of emergency.
Turkey is expected to adopt an increasingly nationalistic line in its foreign policy with the conservative and Islamic-leaning AKP and the nationalist MHP in parliament.
Under the new system, Erdogan will not only run the executive branch but also lead his Justice and Development Party in parliament where he is six short of a majority and therefore allied with a nationalist party.
The president will sit 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.
Erdogan, who has transformed Turkey by allowing Islam to play a greater role in public life and boosting the country's global stature, will take his oath nearly two years after defeating a bloody attempted coup.
The News Agency of Nigeria (NAN) reports President Erdogan emerged victor of the June 25 Turkish presidential election with 52.5 per cent of the total votes cast during the exercise.
HIV Vaccine Candidate Triggers Desired Immune Responses in Humans and Monkeys
They also note that there is no definitive immunological measurement that is known to predict protection against HIV-1 in humans. The experimental vaccine is safe and targeting the immune responses in organisms like monkeys, according to the study.
He won re-election on June 24, with 52.59 per cent of votes.
Opponents say the move marks a lurch to authoritarianism, accusing Erdogan of eroding the secular institutions set up by modern Turkey's founder, Mustafa Kemal Ataturk, and driving it further from Western values of democracy and free speech. Newly elected lawmakers were sworn in at parliament on Saturday.
Together with dignitaries and guests, some 10,000 people participated in the inauguration ceremony.
Russian Prime Minister Dmitry Medvedev will attend, in a new sign of the warm ties between Ankara and Moscow, as will Venezuelan President Nicolas Maduro, regarded with disdain by Washington but an ally of Erdogan.
Leaders of religious communities were also present.
Guests will be given ceremonial 1 Turkish lira coins minted for the occasion. A special stamp will be printed to commemorate Erdogan's inauguration.
Attending heads of state include the presidents of Pakistan, Somali, Bosnia and Herzegovina, Georgia, Venezuela, Zambia, Moldova, and the Emir of Qatar.