Most modern critical scholars consider that the extant citations suggest at least two and probably three distinct works, at least one of which (possibly two) closely parallels the Gospel of Matthew.
It had been lost but was discovered, in a Coptic version dating from c.
The Gospel of Barnabas was a gospel which is claimed to be written by Barnabas one of the twelve apostles.
There is a near-consensus that this gospel had its origins as a "signs" source (or gospel) that circulated within the Johannine community (the community that produced John and the three epistles associated with the name), later expanded with a Passion narrative and a series of discourses.
although Mark 16:7, in which the young man discovered in the tomb instructs the women to tell "the disciples and Peter" that Jesus will see them again in Galilee, hints that the author may have known of the tradition.
Luke, while following Mark's plot more faithfully than does Matthew, has expanded on the source, corrected Mark's grammar and syntax, and eliminating some passages entirely, notably most of chapters 6 and 7, which he apparently felt reflected poorly on the disciples and painted Jesus too much like a magician.
The text was recovered from a cave in Egypt by a thief and thereafter sold on the black market until it was finally discovered by a collector who, with the help of academics from Yale and Princeton, was able to verify its authenticity.
The document itself does not claim to have been authored by Judas (it is, rather, a gospel about Judas), and is known to date to at least 180 AD.