
PwC will work "in close cooperation" with the Vatican's Secretariat for the Economy, headed by Australian cardinal George Pell, a statement said.
On Thursday the pope unexpectedly took part in a meeting of his economy council to thank its members and encourage them to continue overseeing the Vatican's administrative and financial workings.
Vatican charges five over leaks scandal: report
The move to submit the Vatican's finances to an external auditor comes a month after the publication of a book describing the pope's fury over uncontrolled spending and an inadequate accounting system.
According to Gianluigi Nuzzi, author of "Merchants in the Temple", Francis is fighting a war of attrition with vested interests inside the Vatican -- and it is far from clear whether he is winning his battle to change the Catholic Church.
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