VATICAN CITY (AP) - Throngs of the faithful are in St. Peter's Square, ready to cheer the new pope when he steps out onto the balcony of St. Peter's Basilica.
The vast square in Rome is a sea of umbrellas, flags and chanting crowds.
Whoever he may be, the new pope will changes into his papal white cassock, and one-by-one the cardinals approach him to swear their obedience.
He will stop and pray in the Pauline Chapel for a few minutes before emerging on the loggia of the balcony overlooking St. Peter's Square.
Preceding him to the balcony is French Cardinal Jean-Louis Tauran, the protodeacon, who announces "Habemus Papam!" Latin for "We have a pope" and then introduces him to the world in Latin.
He then emerges and delivers his first public words as the leader of the world's 1.2 billion Catholics.
The Vatican's security force, known as the gendarmerie, is in charge of those inside the square, while Italian police handle crowd control just outside the Vatican's boundaries. Security officers from both forces include plainclothes agents dressed up as tourists, watching for any unusual movement.
A tented field hospital went up near the Vatican before the conclave began.
There have been a few "trial runs" of crowd control. Pope Benedict XVI's public audience drew so many people - some 150,000 - that there wasn't enough space for all in the cobblestone square.