The conclave to elect the next pope will start Tuesday, March 12, the Vatican announced Friday. Next week on Tuesday morning, cardinals will celebrate a pre-conclave mass known as the pro eligendo Summo Pontefice asking God to enlighten them. That afternoon, they will enter the Sistine Chapel for the start of the conclave. Some analysts have predicted that a new pope may emerge by the end of the week. The next pope will have to win the votes of at least 77 of the 155 cardinals taking part in the upcoming conclave.