Pope Francis celebrates a mass at St. John Lateran Basilica to mark the Solemnity of Corpus Domini or Corpus Christi in Rome, Italy on May 26, 2016. The Roman Catholic feast of Corpus Domini, commemorates Christ’s last supper and the institution of the Eucharist. The mass was followed by the traditional torchlight procession, in which parish groups, sodalities and charitable and fraternal organizations of all kinds participate along with ordinary citizens, from the St. John Lateran Basilica to the of St. Mary Major Basilica. (Photo by Giuseppe Ciccia/Pacific Press)