From Frederico Lombardi, SJ, Vatican spokesman:

Pope Benedict XVI has given his resignation freely, in accordance with Canon 332 2 of the Code of Canon Law.Pope Benedict XVI will not take part in the Conclave for the election of his successor.Pope Benedict XVI will move to the Papal residence in Castel Gandolfo when his resignation shall become effective.When renovation work on the monastery of cloistered nuns inside the Vatican is complete, the Holy Father will move there for a period of prayer and reflection.