In the West the image showed a full-length enthroned Christ, often in a mandorla or other geometrical frame, surrounded by the symbols of the Four Evangelists, representing the vision of Chapters 4 and 5 of the Book of Revelation. In the Romanesque period the twenty-four elders of the Apocalypse are often seen. Christ also holds a book and makes the blessing gesture, no doubt under Byzantine influence. In both, Christ's head is surrounded by a crossed halo. In Early Medieval Western art the image was very often given a full page in illuminated Gospel Books, and in metalwork or ivory on their covers, and it remained very common as a large-scale fresco in the semi-dome of the apse in Romanesque churches, and carved in the tympanum of church portals. This "seems to have been almost the only theme of apse-pictures" in Carolingian and Ottonian churches, all of which are now lost, although many examples from the period survive in illuminated manuscripts.