The library of Domitian having been consumed by lightning in the reign of Commodus, was not restored until the time of Gordian, who rebuilt the edifice, and founded a new library, adding thereto the collection of books bequeathed to him by Quintus Serenus Samonicus, the physician, and amounting, it is said, to no fewer than 72,000 volumes. In addition to the imperial libraries, there were others to which the public had access in the principal cities and colonies of the empire. Pliny mentions one which he had founded for the use of his countrymen; and Vopiscus informs us that the Emperor Tacitus caused the historical writings of his illustrious namesake to be deposited in the libraries. The number of calcined volumes which have been excavated from the ruins of Herculaneum and Pompeii would also seem to indicate that collections of books were common in those cities. But the irruptions of the barbarians, who overran and desolated the Western Empire, proved more destructive to the interests of literature than either volcanoes or earthquakes, and soon caused the disappearance of those libraries which, during several centuries, had been multiplied in Italy. Those of the East, however, escaped this devastating torrent; and both Alexandria and Constantinople preserved their literary treasures, until their capture by the Saracens and the Turks, who finally subverted the Eastern Empire. When Constantine the Great made Byzantium the seat of his empire, he decorated that city with splendid edifices, and called it after his own name. Desirous to make reparation to the Christians for the injuries they had suffered during the reign of his predecessor, he commanded the most diligent search to be made after those books which Diocletian had doomed to destruction; he caused transcripts to be made of such as had escaped the fury of the pagan persecutor; and, having collected others from various quarters, he formed the whole into a library at Constantinople. At the death of Constantine, however, the number of books in the imperial library was only 6900; but it was successively enlarged by the Emperors Julian and Theodosius the younger, who augmented it to 120,000 volumes. Of these more than half were burned during the seventh century, by command of the Emperor Leo III., who thus sought to destroy all the monuments that might be quoted in proof respecting his opposition to the worship of images. In this library was deposited the only authentic copy of the proceedings at the Council at Nice; and it is also said to have contained the poems of Homer written in gold letters, together with a magnificent copy of the Four Gospels, bound in plates of gold, enriched with precious stones, all of which perished in the conflagration. The convulsions which distracted the lower empire were by no means favorable to the interests of literature. In the eleventh century learning flourished for a short time during the