The cardinals who elected Pope Francis 18 months ago had no inkling that he would turn out to be such a "rock star" pontiff, two "princes of the church" have said.
Jorge Mario Bergoglio, as he then was, seemed shy during the conclave that ended in his election, said Cardinals George Pell, of Australia, and Timothy Dolan, of America.
There were few signs he would make such an impact on the Roman Catholic Church after the secret vote in the Sistine Chapel last year.
Their candid remarks were made on the sidelines of a two-week synod which began last Sunday.
Almost 200 bishops from five continents are discussing issues such as divorce, contraception and the direction of the Catholic Church.