The Apostolic Age is the period of time in which the apostles lived and preached the gospel. This age began with Jesus' Ascension into heaven and ended with the death of the last apostle, John. During this time, the apostles spread Christianity throughout the world by preaching the gospel and performing miracles in Jesus' name. The Apostolic Age was a time of great growth for the early church, and it laid the foundation for Christianity to continue spreading throughout the world.