The funeral of the pope is underway in Vatican City, where throngs of mourners have gathered to give a final send-off to Francis, who will be remembered as a champion of migrants and the poor, and for his efforts to reshape the Catholic Church.

Pope Francis died on Easter Monday at the age of 88. His death set off mourning across the Catholic world and days of ritual at the Vatican. Here are the key things to know about the funeral of the first Latin American pontiff in the church's history: When and where is his funeral being held?