The Epistle of Barnabas is a Greek treatise with some features of an epistle containing twenty-one chapters, preserved complete in the 4th century Codex Sinaiticus where it appears at the end of the New Testament. It is traditionally ascribed to Barnabas who is mentioned in the Acts of the Apostles, though some ascribe it to another apostolic father of the same name, a "Barnabas of Alexandria," or simply attribute it to an unknown early Christian teacher. It was probably written sometime between 70 - 131 AD and addressed to Christian Gentiles.