There are currently 135 cardinals who are under age 80 and eligible to vote in the conclave, hailing from 71 different countries in the most geographically diverse conclave in history. Already two have formally told the Holy See that they cannot attend for health reasons, bringing the number of men who will enter the Sistine Chapel down to 133.

Cardinals from across the world have begun gathering in the Vatican for the conclave, a secret set of votes in the Sistine Chapel to elect the next pope. Each day, dressed in striking scarlet robes, they will make their way from their lodgings in Casa Santa Marta to the chapel, where votes are cast beneath the frescoes.

Two cardinals, Michael Czerny and Chibly Langlois, sat down with ABC News to discuss the challenges facing the church that the new pope will have to face.