As cardinals gather at the Sistine Chapel to begin voting for a successor to Pope Francis, there is no single frontrunner, and it remains unclear whether the new pope will align with Francis’s more inclusive ideology.

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.

The cardinals began the day by participating in a final pre-conclave Mass in St. Peter’s Basilica. The dean of the College of Cardinals, Giovanni Battista Re, celebrated the Mass, which is meant to pray for cardinals to find the wisdom, counsel and understanding to elect a worthy new shepherd.