I am Charlemagne, the King of Europe, who wants a Christian Kingdom.
God has made me emperor!
I think that we have made Charlemagne emperor, not God.
That's so unfair!
I am making some new rules!
Charlemagne was a king of Europe who wanted to build a christian empire. The Pope needed protection so Charlemagne gave it to him and in return the Pope crowned him the emperor. As a result, the Pope won power to crown the emperor which angered the Byzantine emperor.
You are Excommunicated!
Charlemagne believed that God had made him emperor in order to do God's work on Earth. The Pope believed that the church had made Charlemagne emperor. Some 200 years after Charlemagne's coronation, these different views led to a dramatic clash between an emperor and the Pope.
Please forgive me Pope Gregory!
Pope Gregory issued a list of rules declaring his supreme authority over both church and non church leaders alone with Popes having the power to select bishops. He even declared to have the power to remove emperors from the throne in 1730. King Henry was not happy about this.
The Concordant Of Worms is now made official!
Pope Gregory excommunicated King Henry because he disobeyed the Pope's rules by electing his own Bishop for the city of Milan, Italy. Pope Gregory also appointed a Bishop for that same City. The people of Europe reacted by taking sides of the different Bishops.
At first, the conflict between King Henry and Pope Gregory ended by the Pope forgiving King Henry and letting him back in to the church. Yet, King Henry decided to get revenge. The King took his army's and forced the Pope out of office.
The concordat of Worms was an agreement. This agreement was made so that this conflict between Pope and Emperor would not happen again. The agreement meant that the Pope were the only people who could appoint Bishops. The Emperors , however, could grant the Bishops land so that they could earn their loyalty. This agreement was not a success, for this behavior continued over years and years of kingship.