The eyes of the world on Vatican City, as 133 Cardinals, 108 of them appointed by Pope Francis, are set to convene to elect the next Pope. But who has the inside track at being selected as the next leader of the Catholic Church?

Francis’ successor will be selected by cardinals at the conclave that begins on May 7. Cardinals, known as the “princes of the church,” rank just below the pope in the Roman Catholic Church; together, they are known as the College of Cardinals. When a pope dies, the college chooses a successor.