Why did Charlemagne carry a ball around?

Charlemagne is often depicted carrying a ball, which is believed to symbolize his authority and power as a ruler. The ball represents the world or the globe, signifying his role as a sovereign over a vast empire. This imagery is meant to convey his divine right to rule and his responsibilities in governing the territories under his control. Additionally, it serves as a reminder of the unity and stability he sought to bring to his realm.