In this fairly short but dense book, Macmullen covers a wide range of archaeological evidence, almost sans-literary, to redescribe Christianity between 200 and 400 CE. He exposes a very different view of Christianity outside the establishment, which shifts the way we think of the growth of Christianity before, during and after the Edict of Milan. I found the book very insightful and in general I enjoyed Macmullen’s writing style, although it reads more like someone speaking with a lot of tone - so it is difficult to pick up one’s spot if stepping a way from the text for a bit. He’s also a bit repetitive and at times he can be unclear. But overall, this is a fascinating and significant work for any student of Christianity from Tertullian to Augustine.