This category focuses on the origin of the Christian faith as taught and lived by the apostles under the direct authority of Jesus Christ. It begins with the outpouring of the Holy Spirit at Pentecost (Acts 2), covering the missionary journeys of Paul, the Jerusalem Council (Acts 15), the writing of the New Testament Scriptures (41–98 C.E.), and ends with the death of the last apostle, John. The apostolic faith was grounded in eyewitness testimony of Christ’s resurrection, covenant fulfillment, and the proclamation of the Gospel across the Roman world.