133 Cardinals have begun the process of electing a new Pope.
They've taken an oath of secrecy inside the Sistine Chapel.
It's considered an unpredictable Conclave, though 70-year-old Italian Pietro Parolin, is deemed the front-runner.
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One of the favourites to be the next Pope is Cardinal Luis Antonio Tagle, from the Philippines.
He taught Fr Julian Lupot, the parish priest of Ballintober in Co Roscommon - who says he was a genius:
