By the time Francis took over as leader of the Catholic Church in 2013, meetings between the president and the pontiff had become commonplace. During the dozen years that he served as the pontiff, Francis, who died April 21, met each of the three men who served as the U.S. president during his papacy.

Pope Francis began his papacy in 2013 during the Obama administration, but former President Barack Obama is not planning to attend, according to a spokesman.