Brazilian cardinal Odilo Pedro Scherrer leads a mass at the Saint Andrew's at the Quirinal church on March 10, 2013. Roman Catholic cardinals from around the world will assemble in the Vatican's Sistine Chapel from March 12, 2013 for a conclave to elect a new pope in an unprecedented transition after Benedict XVI's historic resignation. As the Vatican prepares to elect a new pope, eyes have focused on Sao Paulo archbishop Odilo Scherer, a moderate conservative tipped as Latin America's top contender. AFP PHOTO / GABRIEL BOUYS