Acts of Thomas is an early 3rd-century text, one of the New Testament apocrypha within the Acts of the Apostles subgenre. The complete versions that survive are Syriac and Greek. There are many surviving fragments of the text. Scholars detect from the Greek that its original was written in Syriac, which places the Acts of Thomas in Edessa, likely authored before 240 AD. The surviving Syriac manuscripts, however, have been edited to purge them of the most unorthodox overtly Encratite passages, so that the Greek versions reflect the earlier tradition. The earliest external reference to the Acts of Thomas dates to c.225 in Origen's Exegesis on Genesis, although this text is now lost and its citation survives via later texts, e.g. Eusebius of Caesarea's Ecclesiastical History (3.1.1–3).
Fragments of four other cycles of romances around the figure of the apostle Thomas survive, but this is the only complete one. It should not be confused with the early "sayings" Gospel of Thomas. "Like other apocryphal acts combining popular legend and religious propaganda, the work attempts to entertain and instruct. In addition to narratives of Thomas' adventures, its poetic and liturgical elements provide important evidence for early Syrian Christian traditions," according to the Anchor Bible Dictionary.
