The Gospel of Barnabas is a non-canonical, pseudepigraphical gospel written in the Late Middle Ages and attributed to the early Christian disciple Barnabas, who (in this work) is one of the apostles of Jesus. It is about the same length as the four canonical gospels combined and largely harmonises stories in the canonical gospels with Islamic elements such as the denial of Jesus' crucifixion. The gospel presents a detailed account of the life of Jesus. It begins with the nativity of Jesus, which includes the annunciation by the archangel Gabriel to Mary which precedes Jesus' birth. The gospel follows his ministry, ending with the message of Jesus to spread his teachings around the world. Judas Iscariot replaced Jesus at the crucifixion.
The gospel survives in two manuscripts (in Italian and Spanish), both dated to the Middle Ages. It is one of three works with Barnabas' name; the others are the Epistle of Barnabas and the Acts of Barnabas, although they are not related to each other. The earliest known mention of the Gospel of Barnabas has been discovered in a 1634 manuscript by a Morisco which was found in Madrid, and the earliest published reference to it was in the 1715 book Menagiana by the French poet Bernard de la Monnoye.
The gospel's origins and author have been debated; several theories are speculative, and none has general acceptance. The Gospel of Barnabas is dated to the 13th to 15th centuries, much too late to have been written by Barnabas (1st century CE). Many of its teachings are synchronous with those in the Quran and oppose the Bible, especially the New Testament; some, however, contradict the Quran.
The Gospel of Barnabas, as long as the four canonical gospels (Matthew, Mark, Luke, and John) combined, contains 222 chapters and about 75,000 words.