While Pope Benedict XVI might be the first Holy Father to voluntarily resign because of old age and deteriorating health, the papacy has a long history of health ailments -- from depression to gout to cancer.
According to church law, as long as a pope is able to conduct Mass, he can continue to do so – even if he is suffering the pain of failing kidneys and is otherwise bedridden, like Pope Alexander VII was in 1667.
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Pope Alexander VII's...
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