Among the Roman cities beyond the Euphrates, we distinguish two recent foundations, which were named from Theodosius and the relics of the martyrs, and two capitals, Amida and Edessa, which are celebrated in the history of every age. Their strength was proportioned, by Justinian, to the danger of their situation. A ditch and palisade might be sufficient to resist the artless force of the cavalry of Scythia; but more elaborate works were required to sustain a regular siege against the arms and treasures of the great king. His skilful engineers understood the methods of conducting deep mines, and of raising platforms to the level of the rampart; he shook the strongest battlements with his military engines, and sometimes advanced to the assault with a line of movable turrets on the backs of elephants. In the great cities of the East the disadvantage of space, perhaps of position, was compensated by the zeal of the people, who seconded the garrison in the defence of their country and religion; and the fabulous promise of the Son of God, that Edessa should never be taken, filled the citizens with valiant confidence and chilled the besiegers with doubt and dismay. The subordinate towns of Armenia and Mesopotamia were diligently strengthened, and the posts which appeared to have any command of ground or water were occupied by numerous forts, substantially built of stone or more hastily erected with the obvious materials of earth and brick. The eye of Justinian investigated every spot; and his cruel precautions might attract the war into some lonely vale, whose peaceful natives, connected by trade and marriage, were ignorant of national discord and the quarrels of princes. Westward of the Euphrates, a sandy desert extends above six hundred miles to the Red Sea. Nature had interposed a vacant solitude between the ambition of two rival empires; the Arabians, till Mohammed arose, were formidable only as robbers, and in the proud security of peace the fortifications of Syria were neglected on the most vulnerable side. SUPPRESSION OF THE SCHOOLS [Sidenote: [529-541 A.D.]] Justinian suppressed the schools of Athens and the consulship of Rome, which had given so many sages and heroes to mankind. Both these institutions had long since degenerated from their primitive glory; yet some reproach may be justly inflicted on the avarice and jealousy of a prince by whose hands such venerable ruins were destroyed.