10. ROMAN JURISPRUDENCE.--In the period which followed, from the death of Augustus to the time of the Antonines, Roman civilians and legal writers continued to be numerous, and as a professional body they seem to have enjoyed high consideration until the close of the reign of Alexander Severus, 385* A.D. After that time they were held in much less estimation, as the science fell into the hands of freedmen and plebeians, who practiced it as a sordid and pernicious trade. With the reign of Constantine, the credit of the profession revived, and the youth of the empire were stimulated to pursue the study of the law by the hope of being ultimately rewarded by honorable and lucrative offices, the magistrates being almost wholly taken from the class of lawyers. Two jurists of this reign, Gregorianus and Hermogenianus, are particularly distinguished as authors of codes which are known by their names, and which were recognized as standard authorities in courts of justice. The "Code of Theodosius" was a collection of laws reduced by that emperor, and promulgated in both empires 438 A.D. It retained its authority in the western empire until its final overthrow, 476 A.D., and even after this, though modified by the institutions of the conquerors. In the eastern empire, it was only superseded by the code of Justinian. This emperor undertook the task of reducing to order and system the great confusion and perplexity in which the whole subject of Roman jurisprudence was involved. For this purpose he employed the most eminent lawyers, with the celebrated Tribonian at their head, to whom he intrusted the work of forming and publishing a complete collection of the preceding laws and edicts, and who devoted several years of unwearied labor and research to this object. They first collected and reduced the imperial constitutions from the time of Hadrian downwards, which was promulgated as the "Justinian Code." Their next labor was to reduce the writings of the jurisconsults of the preceding ages, especially those who had lived under the empire, and whose works are said to have amounted to two thousand volumes. This work was published 533 A.D., under the title of "Pandects," or "Digest," the former title referring to their completeness as comprehending the whole of Roman jurisprudence, and the latter to their methodical arrangement. At the same time, a work prepared by Tribonian was published by the order of the emperor, on the elements or first principles of Roman law, entitled "Institutes," and another collection consisting of constitutions and edicts, under the title of "Novels," chiefly written in Greek, but known to the moderns by a Latin translation. These four works, the Code, the Pandects, the Institutes, and the Novels, constituted what is now called the Body of Roman Law.