Photos: Pope Francis through the years

Born Dec. 17, 1936, in Buenos Aires, Jorge Mario Bergoglio was the eldest of five children of Italian immigrants.

He credited his devout grandmother Rosa with teaching him how to pray. Weekends were spent listening to opera on the radio, going to Mass and attending matches of the family’s beloved San Lorenzo soccer club. As pope, his love of soccer brought him a huge collection of jerseys from visitors.

He said he received his religious calling at 17 while going to confession, recounting in a 2010 biography that, “I don’t know what it was, but it changed my life. … I realized that they were waiting for me.”

He entered the diocesan seminary but switched to the Jesuit order in 1958, attracted to its missionary tradition and militancy.

Around this time, he suffered from pneumonia, which led to the removal of the upper part of his right lung. His frail health prevented him from becoming a missionary, and his less-than-robust lung capacity was perhaps responsible for his whisper of a voice and reluctance to sing at Mass.

On Dec. 13, 1969, he was ordained a priest, and immediately began teaching. In 1973, he was named head of the Jesuits in Argentina, an appointment he later acknowledged was “crazy” given he was only 36. “My authoritarian and quick manner of making decisions led me to have serious problems and to be accused of being ultraconservative,” he admitted in his Civilta Cattolica interview.

His six-year tenure as provincial coincided with Argentina’s murderous 1976-83 dictatorship, when the military launched a campaign against left-wing guerrillas and other regime opponents.

Bergoglio didn’t publicly confront the junta and was accused of effectively allowing two slum priests to be kidnapped and tortured by not publicly endorsing their work.

He refused for decades to counter that version of events. Only in a 2010 authorized biography did he finally recount the behind-the-scenes lengths he used to save them, persuading the family priest of feared dictator Jorge Videla to call in sick so he could say Mass instead. Once in the junta leader’s home, Bergoglio privately appealed for mercy. Both priests were eventually released, among the few to have survived prison.

As pope, accounts began to emerge of the many people — priests, seminarians and political dissidents — whom Bergoglio actually saved during the “dirty war,” letting them stay incognito at the seminary or helping them escape the country.

Bergoglio went to Germany in 1986 to research a never-finished thesis. Returning to Argentina, he was stationed in Cordoba during a period he described as a time of “great interior crisis.” Out of favor with more progressive Jesuit leaders, he was eventually rescued from obscurity in 1992 by St. John Paul II, who named him an auxiliary bishop of Buenos Aires. He became archbishop six years later, and was made a cardinal in 2001.

He came close to becoming pope in 2005 when Benedict was elected, gaining the second-most votes in several rounds of balloting before bowing out.

The Associated Press contributed to this report.