To the vatican, where this morning, they installed a chimney on the top of the sistine chapel. They'll use this chimney to signal to the world when they have chosen a new pope. Unusually, there's no... See More
To the vatican, where this morning, they installed a chimney on the top of the sistine chapel. They'll use this chimney to signal to the world when they have chosen a new pope. Unusually, there's no front-runner. David wright is in rome once again. David, good morning to you. Reporter: Good morning, dan. That chimney is everyone's favorite tradition of the conclave. The conclave set to begin on tuesday. The 25th papal conclave to take place inside the sistine chapel. The first one, 1492. The borgias won that one. The chimney connected to a stove where the ballots are burned if the vote is inconclusive. Black smoke comes out. If it's to confirm the election of a new pope, white smoke comes out. They've installed a farraday cage, a mesh to prevent wireless signals. An electronic cone of silence. It has the added benefit to protect the cardinals in case lightning should strike. As you say, no clear consensus this year as they head into t conclave. No front-runners. We'll all be watching the smoke signals. Thank you, david. The lack of a front-runner could mean this is a longer conclave than usual. Last time around, it was over in about a day. It all starts on tuesday. Abc news will be covering it all with diane sawyer leading our team in rome.
This transcript has been automatically generated and may not be 100% accurate.