1. Jorge Mario Bergoglio was born Dec 17, 1936, in Buenos Aires, Argentina, one of five children born to an Italian railway worker and his wife.
2. His father, Mario Jorge, emigrated to Argentina from the Piedmont region of Italy.
3. He speaks Italian, German and Spanish fluently, in addition to a smattering of English, French and Portuguese. He can also speak a bit of the Piedmontaise dialect too.
4. He lost part of his lung to infection as a youth.
5. He is a fan of the tango. "I love tango and I used to dance when I was young," he told Francesca Ambrogetti and Sergio Rubin, the authors of his 2010 biography El Jesuita.
6. He had a girlfriend. "She was one of a group of friends I went dancing with. But then I discovered my religious vocation," he said to Ambrogetti and Rubin.
7. He worked as a bouncer in a Buenos Aires bar to earn money as a student.
8. He is a passionate fan of San Lorenzo Football Club, his local team. They were the first Argentine team to win the domestic double, in 1972.
9. His favourite painting is The White Crucifixion, painted by Marc Chagall in 1938. The painting shows Jesus being crucified on the cross, wearing a prayer shawl as a symbol that he is Jewish. The painting originally showed a soldier with a swastika on his armband burning down a synagogue.
10. His favourite film is Babette's Feast, a 1987 Danish drama directed by Gabriel Axel.
11. He studied philosophy at the Catholic University of Buenos Aires and also has a master's degree in Chemistry from the University of Buenos Aires.
12. He was a teacher of literature, psychology, philosophy and theology before becoming the Archbishop of Buenos Aires.
13. He is the co-author of "Sobre el Cielo y la Tierra (On Heaven and Earth)", which can be purchased for Kindle.
14. He was previously Archbishop of Buenos Aires, from 1998 to 2013. He was known during this time to try and set an example for others, eschewing the extravagant robes of his position for the humble robes of a simple priest.
15. He used public transport rather than taxis or a chauffeured car to get around and lived in a small flat with an older priest and made all his own meals, despite having access to the Archbishop's quarters and a chef.
16. He was made a Cardinal by John Paul II in 2001.
17. During the 2005 conclave in which he was runner up, he was reportedly the victim of a smear campaign by other, more liberal members of the Jesuit order, who claimed that he never smiled.
18. He travelled to the conclave in Rome on an economy flight.
19. Francis is the first non-European pope since Gregory III, who was born in modern-day Syria and elected in 731.
20. He is apparently not Francis I but Pope Francis. Vatican spokesman Federico Lombardi explains: "It will become Francis I after we have a Francis II." Pope John Paul I, the last pope to affix a 'I', decided to attach it himself.