The reredos behind the High Altar is over 40 feet high, with a canopy including gilded thistles, in a decorative style in contrast to the plain Norman style of the stonework, and was designed by the architect, James Chalmers, himself. It is in memory of Bishop Chinnery-Haldane, who is depicted as St Columba in the right-hand statue. The left-hand statue is of St John. The oil paintings, by the Glasgow artist Norman MacDougall, are a synopsis of the life of Jesus Christ; the Annunciation to Mary (the outer two paintings); the Pieta; and above it the Ascension, set in the West Highlands, with the faces of the apostles being the faces of some of the congregation in 1910.