Source Book for Ancient Church History: The Early Christian Church, its Origins, Theology and Growth from the Apostolic Age to the Rise of Islam (1st to 8th Centuries) - Joseph Cullen Ayer - Bog

This thorough, well-sourced history of the early Christian church follows its origins in the Apostolic Age, through its growth during and after the collapse of the Roman Empire.
The author treats the death of Christ as the starting point for his examination of Christianity's initial rise to prominence via the work of the apostles. Originally commanding only a small following in what is today Israel and its immediate surroundings, the movement grew rapidly despite being banned as heresy by the Roman authorities. Through disparate and spread over a wide area, early Christians were organized; the teachings of Jesus were spread by devoted, literate believers who commonly held copies of the New Testament and other lore.
Great milestones in the history of Christianity, such as the Emperor Constantine's adoption of the faith, as well as the conflicts between different groups of believers, are examined. The emergence of the Catholic church, and the formal papal office of the Bishop of Rome, is detailed.