"Dimissis peccatis vestris, et perducant at vitam aeternam. Benedicat vos onmi potent Deus, Pater et Excilius et Spiritu Santum" ~ The Pope
(Quote translated: Forgiving your sins, but they lead to eternal life. Bless you, amongst powerful God, the Father and the Holy excil)
The Pope was an unnamed man who served as the Vicar of Christ until the time St. Peter's collapse. He leads all the Vatican & Italian Catholics in a mass prayer, standing on the balcony at St. Peters Basilica. He was killed along with his fellow Cardinals and the Italian Prime Minister, and all the people in prayer when the earth's crust began to shift. It is unknown who played him as he was not seen face to face, though it is probable that this was Pope Benedict XVI (as it does read in the original script for the film).