The Vatican says the conclave to elect a new pope will begin Tuesday.

That announcement came on Friday after the last cardinal-elector arrived in Rome last night.

In the past 100 years, no conclave has lasted longer than five days. But with no clear front-runner, some cardinals are warning that may be the case this time around.

"An early vote favors the insiders and that means above all the people well known in Rome. That includes all of the Italians," Vatican expert John Thavis said.

Many Vatican-based cardinals have been pushing for a quick decision-making process. Some say that may be to limit the amount of dirty laundry being aired.

The Vatican appears to be aiming to have a new pope installed by next Friday so he can preside over the Holy Week ceremonies starting Palm Sunday, March 24. 

CBN News Correspondent Chris Mitchell will be in Rome for special coverage of the papal selection.