The form of a parchment book, or codex, would admit of the copying of several books in one volume. The great Bibles of the fourth and fifth centuries of which we know contained all the books; they formed one volume. So the internal unity running through the Bible as a whole came to be represented even in the outward form. The copying of the Bible went on rapidly, monks and noble Christian ladies undertaking it as a form of ascetic work, providing a heavenly merit and sometimes earning bread and butter, too. Instead of the plain copies in an unskilled hand we now find sumptuous books of the finest parchment with purple colouring, in the most luxurious manuscripts the sacred text being written in gold and silver, and the margin sometimes being covered with beautiful paintings. A copy of Genesis in Greek at the Vienna library has forty-eight water-colours, one at the bottom of each page, telling the same story as the text. The manuscript when complete must have had sixty folios: this gives one hundred and twenty of such decorated pages for Genesis, and if it contained the whole Pentateuch we may allow for five hundred and ten illustrations (Plate V). And this manuscript does not stand alone; it is but one of a large group of illuminated manuscripts. This sumptuous appearance may be taken as a sign of the value attached to the Bible. Persecuted hitherto, it became the ruler of the Christian empire, invested with all the glory of royalty. [Illustration: PLATE IV--ROLL AND BOOK St. Luke the Evangelist copying from a roll into a book (codex form): miniature from a Greek manuscript at the Vatican library (gr. 1158), eleventh century. From "Vatikanische Miniaturen." Copyright by B. Herder, Freiburg.] The place given to the Bible is best shown by the fact that it presided over the great councils, a copy of the Bible lying upon the presidential chair. It was meant as a symbol for Christ himself taking the place of honour and deciding the great questions of faith. The same holds true for non-ecclesiastical assemblies. In an ordinance of the emperor Theodosius it is required that a copy of the Bible be present in every court-room. The Bible, or rather the Gospels, or to speak even more precisely the most prominent page in them, the beginning of the first chapter of St. John's Gospel, was used for taking an oath. The worn condition of this page in many a manuscript still attests this use.