Known until Wednesday as Jorge Bergoglio, the 76-year-old is known as a humble man who denied himself the luxuries that previous Buenos Aires cardinals enjoyed. He came close to becoming pope last time, reportedly gaining the second-highest vote total in several rounds of voting before he bowed out of the running in the conclave that elected Pope Benedict XVI.
Groups of supporters waved Argentine flags in St. Peter's Square as Francis, wearing simple white robes, made his first public appearance as pope.
"Ladies and Gentlemen, good evening," he said before making a reference to his roots in Latin America, which accounts for about 40 percent of the world's Roman Catholics.
Pic: Pope Francis speaks from the central balcony of St. Peter's Basilica at the Vatican, Wednesday shortly after being elected pope.
Cardinal Jorge Bergoglio, who chose the name of Francis, is the 266th pontiff of the Roman Catholic Church.