Electing a New Pope: Secrets of Conclave

'Nightline's' Terry Moran travels to Rome and explains how conclave works.
2:52 | 03/11/13

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Transcript for Electing a New Pope: Secrets of Conclave
Well Pope Benedict the sixteenth surprised the world when he became the first Pope in nearly 600 years to step down. Tomorrow a 115 cardinals begin the sanctified in secret process of electing the next Pope. My co anchor Terry Moran reports tonight from wrong with the latest from the papal conclave. -- Cynthia just a few hours from now amid a lot of pageantry and a lot of prayer just behind me there. It begins the cardinals -- the Catholic Church will march in solemn procession into the Sistine Chapel and start voting to pick. Then next Pope and the eyes of one point two billion Catholics around the world will turn here. To Rome waiting looking for that white smoke to billow out of the chimney back there the white smoke that signals. A new Pope has been chose well tonight the cool spring air in Rome is. Thick with suspense tinged with a little bit of intrigue and for so many millions he charged with home. Just imagine this is the long walk -- 115 cardinal electors will take Tuesday afternoon down this splendid corridors of the Vatican and and into one of the grandest spaces in all the world. The Sistine Chapel here. They will vote the books -- procedural rules and prayers in Latin are all in place. The twins stoves or wait one to burn the ballots. The other to burn chemicals to make sure the smoke comes out the right color -- for an inconclusive vote white. For a new -- And tonight another final preparation. Quality you'll meet you -- the Vatican staff. Religious officials to medical doctors -- possible emergencies cooks housekeepers florists. Ninety people all told take a solemn oath of absolute and perpetual secrecy. As for the cardinals themselves many have been out about -- roamed these frantic final days including cardinal Timothy Dolan of New York who said mass at a local church. And who many think has a shot at being the first American Pope. -- -- -- -- -- -- -- -- -- Shorter than your pastor -- whoever is chosen his white people garments already -- small medium and large depending. And they are already hanging in the room of tears with a man who will be elected to lead the church will come first. To change. To pray. And perhaps tradition says. To -- So cool will it be there is no favorite no front runner here in Rome is just feverish with speculation. It's the hope the belief of Catholics that the holy spirit -- this process. But it is men who make the choice and they will take their first vote Tuesday afternoon the prayers of millions are already with them. And the whole world went.

This transcript has been automatically generated and may not be 100% accurate.

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