This book investigates the extent to which Roman religious practices integrated with and transformed indigenous Celtic belief systems in Roman Britain. Dr. Martin Henig, a noted scholar in Roman art and archaeology, utilizes a comprehensive analysis of archaeological findings to challenge the traditional view that Roman influence was merely superficial. He argues that Roman religious veneration was a significant, active force that fundamentally shaped the formal rituals and public temple life of the province.

Scholars and historians frequently cite this work as a foundational text for understanding the complexity of religious syncretism in the Roman provinces. Readers often note the academic rigor and the author's ability to synthesize diverse archaeological data into a coherent historical argument.