The central composition of the main dome — polufigury mosaic of Christ Pantocrator in the medallion. The medallion is encircled by ten colored circles that resemble a rainbow. Around the Christ — the four archangels, of which only one figure in blue — Mosaic, the rest having added oil in 1884 MAVrubel.The interior of St. Sophia Cathedral. In the vault of the main altar is placed a huge figure of the praying Virgin — Orans. She stands out among the paintings of the cathedral grandeur and monumentality richness of colors. This well-preserved mosaic — the original XI century.