Matteo Renzi ( [ matˈtɛːo ˈrɛntsi ] ; born 11 January 1975 ) is an Italian politician who served as the Prime Minister of Italy from February 2014 until December 2016 . Renzi served as President of the Province of Florence from 2004 to 2009 and as Mayor of Florence from 2009 to 2014 . At the age of 39 years and 42 days upon assuming office , Renzi is the youngest person to serve as Italian Prime Minister ( 52 days younger than Benito Mussolini , who took office in 1922 ) and was the youngest leader in the G7 . He was also the first serving Mayor to become Prime Minister . Renzi was sometimes described as the de facto leader of the Party of European Socialists , in opposition to the European People 's Party associated with Angela Merkel ; the two leaders are together often referred to as Merkenzi .
Matteo Renzi has only served as the Prime Minister of Colombia.