The pope typically ends a letter with a formal closing that reflects his role and authority. Common phrases include "In Christ," "Yours in Christ," or "With apostolic blessing." He may also include a blessing for the recipient. The closing is usually followed by his name and title, such as "Francis, Bishop of Rome."
A letter from the pope to the entire Church is called an encyclical.
Eldridge Pope ended in 2003.
Pope Benedict XVI resigned at the end of February 2013; the new pope has yet to be elected.
No He did not predict that as nobody can actually predict when the world will end.
Your holiness.........
Yes, you can receive a letter (certificate) from the pope. It must be requested well in advance from your pastor or bishop.
Pope Paul VI closed Vatican II.
In Search of the Pope's Children ended on 2006-11-20.
Pope Leo XIII reigned from 20 February 1878 to 20 July 1903.
No, when the pope dies a new pope is picked.
Lumen Fidei was the first encyclical of Pope Francis.
Encyclical