Clovis
In A.D. 481 a Merovingian King by the name of Clovis came to power. He was a brutal warrior, who delighted in bloodshed on the battlefield. Fifteen years after taking the throne, Clovis became converted to Christianity.
The conversion of Clovis was critical in European history. He encouraged his people to also convert to this new faith. The Germanic tribes would be critical in later years in defending Christianity against invading Muslims.