Charlemagne's Crown

Origin
Charlemagne was the King of the Franks, Italy and the first emperor in Western Europe since the collapse of the Western Roman Empire. The expanded Frankish state he founded is called the Carolingian Empire. Charlemagne was to be co-ruler with his brother Carloman I until his unexpected death, leaving Charlemagne the sole ruler of the Frankish empire. He protected and fought for the papacy, fighting against the Lombards in Italy and Muslims in Spain, also Christianizing peoples east of his kingdom. Pope Leo III crowned him emperor on Christmas Day in response.

Effects
Those who wear the crown can control the actions of anyone nearby. However, it only works for the entirety of Christmas Day.