Who was the first king to rule with the blessing of the catholic church?

The first king to rule with the blessing of the Catholic Church was Clovis I, the King of the Franks. His conversion to Christianity around 496 AD, after a pivotal battle, not only solidified his power but also established a strong alliance between the Frankish kingdom and the Church. This partnership paved the way for the spread of Christianity in Europe and laid the foundation for the Church's influence over European monarchies. Clovis's baptism by Saint Remigius symbolized the beginning of the Church's role in legitimizing royal authority.