As for the Museum, Mostafa El-Abbadi writes in Life and Fate of the Ancient Library of Alexandria (Paris 1992): “ The Mouseion, being at the same time a 'shrine of the Muses', enjoyed a degree of sanctity as long as other pagan temples remained unmolested. Synesius of Cyrene, who studied under Hypatia at the end of the fourth century, saw the Mouseion and described the images of the philosophers in it. We have no later reference to its existence in the fifth century. As Theon, the distinguished mathematician and father of Hypatia, herself a renowned scholar, was the last recorded scholar-member (c. 380), it is likely that the Mouseion did not long survive the promulgation of Theodosius' decree in 391 to destroy all pagan temples in the city. ” John Julius Norwich, in his work Byzantium: The Early Centuries, places the destruction of the library's collection during the anti-Arian riots in Alexandria that transpired after the imperial decree of 391 (p.314).