The office finally became hereditary in the family of the Carolingians. After Austrasia and Neustria were reunited to form a joint Frankish kingdom, it allowed Pippin III, mayor since 747, to take the crown of the German King from the Merovingians in 751, establishing the line of Carolingian kings. His son Charlemagne, to be crowned Emperor in 800, would then become one of the most prominent figures in French and German history.
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