The ruling Justice and Development Party (AK Party) has officially launched its campaign for the April 16 referendum with an event in Ankara with Prime Minister Binali Yıldırım.
Yıldırım, who participated in the event at Ankara Arena, saluted the tens of thousands of people gathered there.
"I am thanking all you who shared this important moment with us by arriving in Ankara from every Turkish city," he said.
“I am sure our President Recep Tayyip Erdoğan, who initiated this blessed proceeding, is watching us now," Yıldırım added.
More than 10 thousand party supporters from across Turkey along with 500 journalists, including 60 international journalists, attended the event.
The stadium is also hosting up to 123 foreign mission chiefs. The event started at 11:00 a.m.
The event is to announce the party's referendum slogans, video advertisements and new campaign songs to the public.
Nationalist Movement Party (MHP), Devlet Bahçeli's visuals will also be presented at the event due to the support the MHP is giving to the AK Party for the constitutional changes.
While the MHP supports the constitutional changes, the main opposition Republican People's Party (CHP) and the Peoples' Democratic Party (HDP), and the Kurdistan Workers' Party (PKK), have said they are against the constitutional changes.
A shift from the parliamentary to a presidential system has been on the political agenda since Erdoğan, the former prime minister and AK Party chairman, was elected president in August 2014.
Under the current parliamentary model, the people vote for the 550 members of Parliament.
The government is formed by a minimum 276 lawmakers.
In the proposed presidential system, the electorate would vote for a person to form a government independently of Parliament, with no need of a vote of confidence.
