Matteo Renzi (pronounced [matˈtɛːo ˈrɛntsi]; born 11 January 1975) is an Italian politician who served as prime minister of Italy from 2014 to 2016. He has been a senator for Florence since 2018. Renzi has served as the leader of Italia Viva (IV) since 2019, having been the secretary of the Democratic Party (PD) from 2013 to 2018, with a brief interruption in 2017.After serving as the president of the province of Florence from 2004 to 2009 and the mayor of Florence from 2009 to 2014, Renzi was elected secretary of the PD in 2013, becoming Prime Minister the following year. At the age of 39 years, Renzi, who was at the time the youngest leader in the G7 and also the first-serving mayor to become Prime Minister, became the youngest person to have served as Prime Minister. While in power, Renzi's government implemented numerous reforms, including changes to the Italian electoral law, a relaxation of labour and employment laws with the intention of boosting economic growth, a thorough reformation of the public administration, the simplification of civil trials, the introduction of same-sex civil unions, and the abolition of many small taxes.After the rejection of his constitutional reform in the 2016 Italian constitutional referendum, Renzi formally resigned as Prime Minister on 12 December; his Foreign Minister Paolo Gentiloni was appointed his replacement. He resigned as secretary of the PD following defeat in the 2018 Italian general election. In September 2019, he left the PD and founded the Italia Viva party. In January 2021, Renzi revoked his party's support to the Conte II Cabinet headed by Prime Minister Giuseppe Conte, which brought down the government and resulted in the 2021 Italian government crisis. In February 2021, Renzi's IV supported Prime Minister Mario Draghi's national unity government. Renzi has been described as a centrist and as a liberal by political observers.