Archbishop Paul Cremona and Gozo bishop Mario Grech are at the Vatican in Rome to attend the canonisation of Blessed Pope John XXIII and Blessed Pope John Paul II.
They are expected to concelebrate in the Mass to be led by Pope Francis in St Peter Square on Sunday.
Bishop Grech is also leading a group of around 50 Maltese and Gozitan pilgrims.
They will return to Malta on Tuesday.