Final answer:
Charlemagne, also known as Charles the Great, established a non-gold money system and organized his empire into counties. He ruled over a vast territory and had to put down rebellions to maintain control.
Step-by-step explanation:
Charlemagne, also known as Charles the Great, established a non-gold money system, organized his empire into 350 counties, and copied great Latin works. He ruled over a vast empire that extended from modern France to Germany, northern Italy, and parts of northern Spain and central Europe. Despite his efforts, rebellions against his rule were frequent, and he had to war against former subjects to maintain control.