On NBC’s Today Show the correspondent from Rome mentions that this is first resignation of a Pope since Celestine V in 1294, who Dante may have been indicating when he referred to the sinner among the Undecided (Inferno 3) who made the “great refusal.”
Many other reporters and commentators discussing Benedict XVI’s resignation are also mentioning Dante’s supposed (but debated among scholars) placement of Celestine V in Hell. See, for example, Carol Zaleski’s piece in the New York Times, February 11, 2013.

Contributed by Julie Heyman