Only I can appoint Bishops and remove the EMPEROR!
Charlemagne was a great king in Europe who wanted to create a Christian empire. In 799, a man named Pope Leo asked the king for protection, he agreed and was rewarded by being crowned "All Holy Emperor." Since then, the Pope had the power to crown an emperor, which angered the Byzantine Emperor.
Sure, your the next Bishop
Charlemagne believed God made him Emperor to do gods work on earth. The Pope believed that he had to do Gods work on earth and Charlemagne was his assistant. The different views led to different ideas, which led to a clash.
Sure... i guess...
Please! take me in! Please!!
After 695 years, Pope Gregory issued a list of rules declaiming him supreme authority. Gregory said he could choose Bishops and could remove the Emperor. King Henry felt that the Pope was attacking his power and rights.
AHHHHH!?! WHOSE IN CHARGE?
When Henry ignored Gregory's rules and choose a bishop himself, Gregory choose another bishop. Gregory excommunicated Emperor Henry. The people were confused and worried who to trust.
King Henry ended Pope Gregory's rule in the church and made him free to go to the church. The Contract of the Worms was mad in the city Worms, it is a agreement to give the church rights to choose a bishop and allowing the emperor to give fiefs to bishops. It was not a success.
The Pope and Emperor continued to have conflicts. They couldn't figure out what to do for the people because they still believed that they were sent to earth to do God's work. The people were unstable at this time.