President Trump and President Volodymyr Zelensky of Ukraine are among the world leaders who plan to attend the funeral. The conclave to choose his successor will most likely start at least a week later.

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.

Worshippers will flock to the Vatican in the coming days to farewell Pope Francis, including the Cardinals who will elect his successor. Former representative to the Holy See, Sir David Moxon, says the Pope chose most of the Cardinals - so he'd expect them to value a warm and loving Church.