Manuscripts in St. Catherine's Monastery, Mount SinaiThe renowned Eastern Orthodox Monastery of St. Catherine’s on Mt. Sinai was constructed by the Byzantine Emperor, Justinian I, in the late sixth century AD over the relics of the martyred saint and the place of the biblical burning bush as identified by St. Helena, the mother of the Roman Emperor, Constantine. It is home to reputedly the oldest continuously run library in existence today. Its holdings of religious and secular manuscripts are legendary and allegedly second only in number to the collection held by the Vatican: from bibles, to patristic works, to liturgies and prayers books, and on to legal documents such as deeds, court cases, Fatwahs (legal opinions). The greater proportion of the manuscripts were copied in Greek, and then in Syriac, Georgian, Coptic, Armenian, Arabic, Ottoman Turkish, and Ethiopic, as well as Old Church Slavonic.