Very interesting book, I was surprised. All the commentaries I’ve seen toss it aside as a hagiography of Constantine. To be fair, there is some of that. But skipping this book because of that would be throwing the baby out with the bathwater.
At the end of the 3rd century, Emperor Diocletian established the tetrarchy to rule the Roman Empire. The tetrarchy consisted of two senior Caesars (Augusti), and their two successors (caesars), with one Augustus ruling the western empire and one ruling the east. In 305, Constantine’s father Constantius became one of the Augusti, but died the next year in 306. Constantine was then declared Augustus by Constantius’ army, which preceeded a long battle for power among various Caesars and Caesar wannabes. Long story short, by 324 all the rival claimants were dead or sidelined and Constantine became the sole Augustus.
The first section of the book is basically history, telling of Constantine’s father, Constantines’ relationship with the other Caesars, conflicts with them and how they were resolved militarily, ending in Constantine being the sole Caesar, Augustus. Some of the other Caesars were virulently anti-Christian, and the book describes that. Once Constantine consolidated power, he began restoring the property and position of the Christians, and there are long sections with quotes from primary sources about how he did that. The first section ends with his death and the long planned ascensions of his sons to fill his place.
The second section totally surprised me. It is The Oration of the Emperor Constantine to the Assembly of the Saints. This is a 40 page or so section that dwells not on his greatness, but on the greatness of God. It is a tightly argued argument for the existence of God, the limitations of “philosophy”, that Christ was predicted and indeed is the Word of God, the necessity of virtue, and the certainty of judgement. He ends by ascribing anything good within him to God, and anything deficient to his own failings. Hardly the typical work of a triumphal, all powerful emperor.
The third section is by Eusebius, delivered as an oration on the 30th year of his reign (near the end of his life). One would expect this to be a long hagiography about Constantine, but again one would be wrong. This is a 45 page theological and doctrinal dissertation laying out the very foundations of Christianity. There are of course some nods to Constantine, but by and large this is a defense of the faith in the fullest sense of the term. In a way, it picks up where Eusebius’ Ecclesiastical History leaves off. That books covers several hundred years of history, where this one covers more like 50 – 60.
I highly recommend you read this book if you have the slightest intellectual curiosity about what Christianity looked like in the 4th century before the collapse of the western Roman empire and the advent of the “dark ages”. In some way it is so similar to what we know as Christianity today, but in other ways it is strikingly different. Probably the biggest difference is the visceral, life and death nature of their devotion to the Word of God (aka Christ). There were approximately zero cultural Christians then. To be a Christian was to stand a good chance of being tortured or killed for your faith, or being forced to recant.