11 February 2013 Last updated at 10:09 ET
Pope Benedict XVI in shock resignation
Apparently, nobody saw this coming.Pope Benedict XVI is to resign at the end of this month after nearly eight years as the head of the Catholic Church, saying he is too old to continue at the age of 85.
The unexpected development - the first papal resignation in nearly 600 years - surprised governments, Vatican-watchers and even his closest aides.
The Vatican says it expects a new Pope to be elected before Easter.
Cardinal Joseph Ratzinger became Pope in 2005 after John Paul II's death.
The BBC's David Willey in Rome says the move has come as a shock - but adds that in theory there has never been anything stopping Pope Benedict or any of his predecessors from stepping aside.
Under the Catholic Church's governing code, Canon Law, the only conditions for the validity of such a resignation are that it be made freely and be properly published.
But resignation is extremely rare: the last Pope to step aside was Pope Gregory XII, who resigned in 1415 amid a schism within the Church.