Some centuries later two of the Assyrian kings, Sennacherib and Assurbanipal, collected a great library which has been in large part recovered. Such a library, as we have seen, consisted of clay tablets and these tablets were kept in large earthenware jars. The contents of the library were partly contemporary but more of it consisted of copies of ancient works. Many thousands of these texts have been recovered from the ruins of Babylon and are now being translated. They cover the whole field of literary activity, religion, law, history, grammar, science, magic, and romance. One of the old Israelitish cities, near Hebron, is called Kirjath-sepher, or city of books. Both the city and the name, however, antedate the Jewish occupation of Palestine and are probably memorials of a time when this city was a center of that Assyrian culture which covered the entire region later known as Palestine. The classic civilization, with its great development of literary activity, of course involved the formation of libraries in all the more important cities, as such places were the natural centers of culture. We know something of the libraries of Athens, Antioch, Ephesus, Pergamus, Rome, Alexandria and Constantinople. The most famous of these was the great collection, or rather collections, of books at Alexandria. Collectively these rivalled in size some of the great modern libraries, a very remarkable fact when we consider the conditions under which books were made at that time. Undoubtedly practically the entire literary output of the classic civilization was contained in these collections. Unfortunately no traces of them remain. Accident and conquest caused their entire destruction. The earlier historians told a pitiful tale of the wanton destruction of the library by the Mohammedan conquerors who in their fanaticism destroyed as useless or harmful all works not devoted to the dissemination of their own doctrines. While it is probably true that the Mohammedans were responsible for a wholesale destruction, it is probable that the library had already suffered sadly by the destruction by fire of one or more of its separate collections and that what was destroyed in their time was only the remains of the former splendid collection. The library of Constantinople, being later than the others in its formation, probably had more direct effect on the culture of mediaeval and modern times than any of the preceding ones. In addition to these great public or semi-public libraries, there were of course great numbers of private libraries. Wealthy and cultivated men throughout the Roman empire and beyond had their private collections, as wealthy and cultivated men do to-day. While the illiterate classes were proportionally much more numerous than they are in modern communities, and the use of books was limited to a comparatively small portion of the population, the small educated class was highly cultivated and keenly interested in the reading and ownership of books.