Pope Benedict XVI was the Bishop of Rome from 2005-2013.
 At the age of 85 years and 318 days on the effective date of his retirement, he was the fourth-oldest person to hold the office of pope
"=== Health ===Prior to his election as pope in 2005, Ratzinger had hoped to retireon account of age-related health problems, a long-held desire to have free time to write, and the retirement age for bishops (75)and submitted his resignation as Prefect of the Congregation for the Doctrine of the Faith three times, but continued at his post in obedience to the wishes of John Paul II

