Professor Alice Roberts takes us on a gripping investigative journey to discover who spread Christianity, how, and why? In her quest to find the answer, from a secluded valley in south Wales to the shores of Brittany; from the heart of the Roman Empire in a time of political turmoil to the ancient city of Corinth in the footsteps of the apostle Paul; from Alexandria in the fourth century to Constantinople.

As the Roman Empire crumbled in Western Europe, a shadow of power remained, almost perfectly mapping onto its disappearing territories. And then, it continued to spread. Unearthing the archaeological clues and challenging long-established histories, Professor Roberts tells a remarkable story about the relationship between the Roman Empire and Christianity.

Lifting the veil on secrets that have been hidden in plain sight, this story is nothing short of astonishing.

Please come along, even if you haven't read the book; it's an occasion to discuss humanist issues and meet other people interested in humanism.