An Irish-born American cardinal was entrusted by Pope Francis to be the camerlengo, the Vatican official who runs the Holy See after the death of one pontiff and before the election of another.

Following Pope Francis' death Monday at age 88, the Vatican will have an acting head until a new pontiff is chosen during the conclave process. That acting head, or camerlengo, is Cardinal Kevin Farrell,

Pope Francis's funeral is on Saturday, and now's the time to familiarize yourself with a few Catholic terms and phrases that you will hear this week.

The pontiff’s death initiated a well-structured series of rituals designed to mourn the loss of the 1.3 billion-member church’s leader and to ensure stability with the selection of a new pope.