Jorge Mario Bergoglio of Argentina hailed crowds of tens of thousands packed into St Peter’s Square after being elected as the new leader of the Roman Catholic Church.
Taking the name Francis I, the 76 year old became the first non-European pope in nearly 1,300 years.
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Footage shows Joseph Aloisius Ratzinger, Francis I’s predecessor, announced as Pope Benedict XVI in 2005.
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A video shows the beginning of John Paul II's reign as pope in 1978.
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Footage shows Pope Pius XII, pontiff from 1939 to 1958.