Charlemagne after being crowned, shortly before writing laws

In his empire, Charlemagne implemented and reformed laws which helped develop the medieval monarchy called Admonitio generalis. Charlemagne was the first king to write his own laws for his kingdom. He took the laws of his people, including those he conquered, to create a set of laws that his entire kingdom could live by. Some provinces had slightly different laws, but overall, it was the Frankish law that ruled. He implemented his laws by having leading members of each province read them aloud. Many of the laws pertained to new Christian reforms.