ROME, Feb. 17 -- The leader of the center-left Democratic Party (PD), Matteo Renzi, was appointed as new Italian Prime Minister on Monday.

Renzi, 39-year-old mayor of Florence, was summoned by Italian president Giorgio Napolitano at Quirinale presidential palace in the morning and given a mandate to try to form a new cabinet, after the resignation of Prime Minister Enrico Letta last week.

"I accepted the mandate President Napolitano has given me with reserve, and I will put all my energy and strength in the commitment of forming a new government that could last until the natural end of the parliamentary term and implement all necessary reforms," Renzi told reporters.

"Today I will meet with the presidents of the Senate and the House of Chambers and then I will begin talks with political parties to strike a deal on the program," Renzi added.

"The new program will require an urgent discussion on constitutional reforms to be carried out during February. Then government and parliament will be put at work on the unemployment emergency in March and on the reform of public administration and tax system between April and June," he concluded.

Renzi is the youngest Italian prime minister ever.