The Shepherd of Hermas (Greek: Ποιμὴν τοῦ Ἑρμᾶ, Poimēn tou Herma; Latin: Pastor Hermae), sometimes just called The Shepherd, is a Christian literary work of the late first half of the second century, considered a valuable book by many Christians, and considered canonical scripture by some of the early Church fathers such as Irenaeus. The Shepherd was very popular amongst Christians in the 2nd, 3rd, and 4th centuries. It is found in the Codex Sinaiticus.