The Didache, the Epistle of Barnabas, the Epistle and Martyrdom of St. Polycarp, the Fragments of Papias, the Epistle of Diognetus, Vol. 6
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The Didache or The Teaching of the Twelve Apostles, probably written before the end of the first century, purports to be an instruction based on sayings of the Lord and given by the Twelve Apostles to pagans who wished to become Christians.
