Vatican expert says conclave should last 'three of four days' Cardinals from around the globe will hold a conclave in the Sistine Chapel from next Tuesday to elect a new leader of the world's 1.2 billion Catholics, after "pope emeritus" Benedict XVI's historic resignation. Vatican watchers have suggested the cardinals are split roughly into two groups, between those who think that Italy's Angelo Scola, the Archbishop of Milan, is the man to lead the Church, and others who would prefer a non-Italian in charge. Interview with a Vatican expert.