Hints and tips:
...No pope since Celestine V in 1294 had stepped down for personal reasons, although Gregory XII left office in 1415 under a deal among rival factions to end a 40-year schism in the Roman Catholic Church....
...“In the case of Celestine V, the basic reason was that he was quite incapable of dealing with his in-tray, so to speak....
...Benedict is the first pontiff to leave office of his own free will since Celestine V in 1294....
...Until Monday he had given no explicit sign that he planned to become the first pope to stand down for personal reasons since Celestine V in 1294....
...Benedict surprised millions of Catholics when he announced on February 11 that he would abdicate, making him the first pontiff to step down voluntarily since Celestine V in 1294....
...Before him, Celestine V established the right of a pope to abdicate, doing so himself in 1294....
...Celestine V, the last pope to abdicate voluntarily, resigned in 1294 after just five months. Pope Benedict’s resignation generated responses from across the globe....
...The past 11 conclaves have lasted no longer than four days, but the 13th century election of Celestine V, aged 84, took more than two years. He spent only five months in office....
...The last Pope to abdicate was Celestine V in 1294 an act for which Dante, the medieval poet, condemned him to the vestibule of hell in the “Inferno” part of his Divine Comedy....
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