I am Charlemagne and I want to improve the Church! Would you like the safety of my court?
You are now emperor.
No he didn't!
God made me the emperor!
Charlemagne was a devout Christian and his goal was to thank god by improving the Church. The Pope and Charlemagne worked together by giving the pope safety of his court.
Ha Ha! I can choose my own bishops!
I don't care! I'll choose my own!
Because of this, the pope crowned charlemagne emperor. Two lasting effects of this correlation were that the two churches split from each other, and it strengthened the power of the western church.
You tried to remove me? I have to excommunicate you!
Charlemagne believed that god made him the emperor in order to do god's work on Earth. The pope believed that the church had made Charlemagne emperor. 200 years later, there was still conflict between the emperor and the pope.
Pope Gregory issued a list of rules saying that he has supreme authority over the church and secular leaders. He declared the pope alone could choose his own bishops. He could also remove any emperor. The stage was set for a clash between Charlemagne and the Pope.
King Henry ignored the pope’s rules and named his own bishops. He did this for the city of Milan, Italy. Pope Gregory appointed a rival bishop in response. Then, Henry tried to remove the pope. The Pope then excommunicated Henry.
The conflict between these men ended after they both died. They could not find a way to resolve their conflict while they were still living. The church and the Roman Empire reached a agreement known as the Concordat of Worms. This agreement gave the Church the sole authority to appoint bishops.