What is the sixth gospel?

AnswerApart from the four gospels that were finally accepted into the New Testament canon, there have been many gospels about Jesus. The Gospel of Thomas is often considered to be the 'fifth' gospel because there was strong early support for its inclusion. There are several other gospels from the second century that could have been included and could therefore be called the 'sixth' gospel, had Ireneus not insisted that there must be exactly four gospels.