Gospel of Judas
2nd c. (Greek original); Coptic copy c. 280 (radiocarbon) · Coptic (from Greek)
Groups: Sethians (Sethian Gnostics; "Gnostikoi")
Irenaeus (AH I.31.1) knew of a 'Gospel of Judas' used by 'Cainites'. A Coptic copy surfaced on the antiquities market in the 1970s and was published in 2006. It was badly damaged while in dealers' hands.
Where the manuscripts are now
Codex Tchacos (Maecenas Foundation); agreed to be returned to the Coptic Museum, Cairo, Cairo, Egypt (custody not verified)
Codex Tchacos pp. 33–58
Sources
Mark M. Mattison n.d.. Public-domain dedication by translator