The Venerable Bede had an extraordinary impact on Christians in that he is largely responsible for helping to spread Christianity throughout England in the eighth century. It would first be appropriate to mention Bede's innovation of what is often called "Christian chronology," which begins dating important events relative to the birth of Christ. This became common throughout England as well as throughout Europe. Secondly, one can't mention Bede's impact on Christians without mentioning his Historia Ecclesiastica Gentis Anglorum (or A History of the English Church and People). In addition to reporting a thorough history of England dating back to Cesar, Bede also details the differences between Celtic Christianity and Roman Catholic Christianity. Although the work itself is a "history," Bede doesn't shy away from reporting legend and often reports contested miracles as fact. Most importantly, Bede is famously credited for what is sometimes called the "Christian renaissance" in England that happened during the eighth century. In fact, the spread of Christianity throughout England was a dominant theme of that time in addition to England's political unification.