Big news from Rome: The Vatican announced this morning that Pope Benedict XVI is resigning at the end of the month.

The last time a Pope resigned, it was in 1415—and the purpose was to end the Western Schism. (Three men were all claiming to be the Pope simultaneously. Things got confusing). This time, the 85-year-old Pope’s reason for his departure seems a little more personal. It’s most likely because of his health, which seems to have been deteriorating in recent months. You can read the Pope’s declaration of his resignation here.