Indeed some innovations were made by key members of the Museion, the institution dedicated to the Muses that included the library. Those specialist certainly served as the personal physicians of the kings. Moreover ingeneers like Ktesibios designed new models of catapults and funny but not always useful automats. The most important benefits would be the educations of the kings and on a more political level, the library helped to settle the reputation of Alexandria as the center of the hellenistic culture. This was very important in the early IIIrd century BC when the hellenistic kingdoms were still recent creations looking for legitimacy in order to establish their superiority over the others. By making themselves the champions of greek culture, the Ptolemies tended to show their seleucid rivals as "persians" in a continuity of the famous conflicts of the V-IVth centuries BC.