Resign Repeat Poem by Ima Ryma

Pope Benedict for health resigned
In the year 2013.
Have to go back a ways to find
Last a resigning Pope was seen.
1415, the Great Schism,
Gregory the 12th was Pope picked,
But without much optimism,
As the cardinals politicked.
The Council of Constance did patch
In back room doings not divined.
The Great Schism - a deal did hatch.
Gregory on his own resigned.

Resigning Popes are rare and why? -
Tiz preferred that the Pope should die.