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 al extent; but he divided it between his two sons, Arcadius and Honorius (394), and its parts were never afterwards reunited.

From the death of Theodosius II (449) to the reign of Justinian (527), the Eastern Empire continued without any considerable alteration, though there were many changes and intrigues in the court and army. The reign of the latter prince is memorable on several accounts: it was under his auspices that a knowledge of the silk manufacture was first brought to Europe, where it gave employment to much ingenious industry (900). Justinian also caused certain eminent lawyers to prepare a code of laws, and an abridgement of law decisions, etc. called the Pandects, which were used by all his successors, and have been adopted as the basis of their laws by several countries of Europe. With the single exception of the Code de Napoleon, these form the only complete and perfect abstract of national law which any government has given to its people. Whatever may have been Justinian's errors in other respects, his having projected this work, and procured so many able ministers to execute it, must redound forever to his honor. The talents and virtues of his general Belisarius regained to the Empire Africa and a great part of Italy, from the Vandals and Ostrogoths; this conquest, however, only prevented the latter region from being united under one government, and has been the cause of its remaining a feeble and divided country ever since. In the reign of Tiberius shortly after (580), the people of Rome, though they entreated with great earnestness the aid and pity of the emperor, who now claimed to rule over them, were unable to obtain any relief, and remained distracted between their attachment to the ancient head of the Empire, and the claims of his enemies who occupied the rest of Italy.

The next emperor who merits attention is Heraclius (610), a native of Africa. The Eastern Empire had till now preserved its ancient boundaries in their full extent, and was mistress of Carthage, Egypt, Syria, and Asia Minor, besides Greece, and the countries on the Danube. The Roman armies on the eastern frontier had, however, been lately driven in by Chosroes, king of Persia, who now occupied all the north of Africa and Syria. This was the first great violation of their territory sustained by the emperors of Constantinople; and Heraclius avenged it with a celerity and effect which made the Persians tremble. His triumph, however, was short, for the latter part of his reign was disturbed by the rise and victories of Mohammed. The successors of this signal impostor, after breaking the power of Persia (already weakened by the victories of Heraclius), immediately attacked the Roman Empire; then defeated its armies in two battles, occupied all Syria, and obliged the emperor (now an old man) to retire to Constantinople. He died in 641.

The continued victories of the followers of Mohammed (called Arabs or Saracens) soon deprived the Empire of Egypt, Africa, and Syria; and in 668 they followed up their success by attacking Constantinople itself. The city sustained two sieges, in the first of which the Saracens were encamped in its neighborhood, and carried on the operations of a siege at intervals, for seven years; and in the second, for nearly two. In both the Saracens wasted immense resources ineffectually.

The Empire had now lost all its provinces eastward of Mount Taurus, and the cities of Alexandria, Jerusalem, and Antioch, were in the hands of the Mohammedans. There was little further change in its condition till the