The Gospel of Mark, the shortest, is also held by most to be the first of the Gospels to be written. A tradition dating from the 2nd century ascribes this book to John Mark, a companion of Peter and also of Paul and Barnabas in their missionary endeavors. The preaching of Peter may well have been the source of most of Mark’s material. Mark accounts for the ministry of Jesus from His Baptism to His Ascension. Most commentaries agree that Mark’s purpose was neither biographical nor historical, but theological: to present Jesus as the Christ, the mighty worker rather than great teacher. Hence, Mark makes fewer references to the Parables and discourses, but meticulously records each of Jesus’ "mighty works" as evidence of His divine power. Mark contains 20 specific miracles and alludes to others. Bible scholars quite generally agree that Mark wrote his Gospel in Rome for the gentiles.