Codex Sinaiticus is the world's oldest Bible and the most important Biblical manuscript. It was written by hand in the mid-fourth century around the time of Constantine the Great. Though it originally contained the whole of the Old and New Testaments and the Apocrypha in Greek, half of the Old Testament has since been lost. The surviving manuscript concludes with two early Christian texts, an epistle ascribed to the Apostle Barnabas and ‘The Shepherd' by Hermas.
Codex Sinaiticus is named after the Monastery of St Catherine in Sinai, Egypt. St Catherine's is one of the oldest, continuously active, Christian monastic communities in the world and traces its origins back to the fourth century.