In the last 10 years, Pope Francis is the Catholic Church Father.
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However, Pope Benedict XVI's revelation in 2013 that he would virtually resign was shocking at the time.
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Why did Pope Benedict resign?
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On February 11, 2013, Pope Benedict resigned as the first pope in 600 years.
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At the age of 85, he was the oldest pope in centuries, he was elected on April 19, 2005.
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Benedict's papacy was dealing with a number of major challenges at the time.
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Some of the Documents has leaked by his former butler in Italian media
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Which exposed some secret internal chaos, and allegations of corruption and wrongdoing.
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Due to growing criticism of the Vatican bank's murky business practices, global financial institutions temporarily halted credit transactions in the world's smallest nation.
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Catholic priests have been accused of widespread sexual abuse, and the church hierarchy has been trying to cover it up for decades.
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Then Pope made his decision to resign.
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Pope Francis asks for prayers for former Pope Benedict XVI