Mosaic's remains of the dome (uppermost zone) in the Rotunda of St. George in Thessaloniki depicting three surviving heads — there would originally have been four — and a phoenix, the mythical bird that symbolized immortality and eternity. In their hands the angels are holding an astonishingly beautiful triple 'glory' composed of stars, a wreath of leaves and fruit, and a colored rainbow. Inside the glory was depicted the figure of Christ, now lost, was depicted standing, holding a staff surmounted by a cross, a symbol of his victory over death.