Pope St. Celestine V
This
13th-century Bishop of Rome was a reluctant pope. In fact, during a time of an impasse in the papal elections, Celestine (also known as Peter of Morrone) was forced away from his hermit lifestyle to take up position as pope. He found the papal life difficult to assume and eventually resigned five months later to return to his humble lifestyle. He was imprisoned to prevent him from assuming the position of antipope, and died aged 81.