The wire services routinely refer to Benedict XVI, now the pope emeritus, as the first pontiff to abdicate in 800 years. But few of the news stories go into just who this earlier pope was, and why he chose to end his papacy. Which is understandable. The big story of 1294 is scarcely breaking news today. But it's a pity more attention isn't paid to the abdication of Celestine V, now St. Celestine, aka Celestino. Because history can prove instructive.