Pope Francis holds the Gospel book as he celebrates a Mass prior to the Corpus Domini procession from St. John at the Lateran Basilica to St. Mary Major Basilica to mark the feast of the Body and Blood of Christ, in Rome, Thursday, May 26, 2016. The event is dedicated to the mystery of the Eucharist and concludes the cycle of feasts following Easter. (AP Photo/Alessandra Tarantino)