Welcome to the church! I am Pope Gregory the seventh. I believe that I have many rights, but some people, like that Henry guy, don't believe I should.
Thank you your Highness!
You are the new bishop of Milan.
Charlemagne was a European christian. A pope, whom Charlemagne had protected from roman soldiers, crowned him emperor. This started conflicts with people who thought that popes shouldn't have the right to crown an emperor or take him from the throne either. Emperor Henry the fourth was one of these people.
I'm sorry. Will you forgive me?
Pope Gregory thought that he had authority over church and non-church leaders, power to choose bishops for the church, and had the right to crown or dethrone any of the emperors. Emperor Henry and Pope Gregory had fights deciding who was allowed to appoint bishops. King Henry started the fight by appointing his own bishop for the city Milan
The emperor and the pope went back and forth choosing bishops. For instance, after the emperor selected a bishop for the city of Milan, Pope Gregory selected his own bishop too. Sides were formed and a schism started between churches.
Hopefully this Concordat of Worms will solve the arguing.
The people of the clergy and the secular started to take these sides. Some thought that the pope should have the power to chose bishops, but others thought that the emperor should instead. This conflict split the Western and Eastern churches up and worsened the schism.
Eventually, emperor Henry went to apologize to Pope Gregory for not listening to his rules, but he had to wait outside for three days in the snow to before the pope would see him. Henry said his apologies, but later took revenge on the pope. He marched his army into Rome and forced the pope from office.
The agreement called the Concordat of Worms gave the Pope the ability to chose and hire bishops for the church, yet the emperor could grant land to the bishops to gain their loyalty. However, this agreement didn't last long. Popes and rulers continued to have conflicts later on.