The Catechism in Questions & Answers

439. What New Testament text describes the activity of the Apostles in the greatest detail?

Luke describes the activity of the Apostles in greatest detail in the book of Acts. For example, in Acts 11: 1-18 and 15: 1-29, we read of councils under the leadership of Apostles in which, among other things, it was decided that believing Gentiles would also be permitted to belong to the church of Christ. Together the Apostles thus made decisions that had far-reaching implications for the Christian church.