which is kept consecrated bread from the Eucharist. They may catch a glimpse of the decoration of the apse. Nearest the ground two rows of bishops, vested for the Liturgy, turn towards the altar. Above them Christ stands at an altar, giving Communion to the apostles, on one side from the consecrated bread, on the other from the chalice. From the semi-dome of the apse, perhaps visible above the icon-screen, the Mother of God looks out above the altar into the nave. But worshippers will almost certainly