Over the years there have been many controversies between popes and emperors. Please specify one of them.
This was the investiture controversy. The pope wanted to stop the emperor ordaining (investing) clergymen to high positions in the German church because he thought that only the pope, as a prelate had the right to do this. The emperor was opposed to this.
The Lay Investiture Controversy was ultimately resolved through the Concordat of Worms in 1122. This agreement between Pope Calixtus II and Holy Roman Emperor Henry V established that the pope had the authority to appoint bishops and abbots, while secular rulers retained the right to invest them with symbols of their temporal power. This compromise helped to separate the spiritual and temporal powers in the church and ended the conflict over who had the authority to appoint church officials.
the weakening and eventual break up of Germany. <----- Study Island
the pope and the emperor disagreed on who controlled a certain part of Rome, so the pope eventually banished the emperor from the church.
Henry, as the king, thought that he should appoint bishops in his kingdom. The pope felt that only the pope could appoint bishops. It is known as the investiture controversy.
Pope Gregory died leaving Henry iv to do as he pleased
The creation of the Holy Roman Empire restored the alliance between the pope and the emperor which had been established between Pope Leo III and Charlemagne. Pope John XII and Otto signed a document which declared the pope was the head of the church and Otto was the secular protector of the church.
The Roman emperor had to answer to the pope.
Following Charlemagne's coronation as Holy Roman Emperor, the relationship between the Pope and the King became closer because the Pope saw the Emperor as a powerful ally who could help protect and promote the interests of the Church. This alliance strengthened the authority and influence of both the Pope and the King, leading to a closer partnership between the two.
Pope Gregory VII checked the power of the Holy Roman Emperor by asserting the principle of papal supremacy, particularly through the famous Investiture Controversy. He opposed the practice of lay investiture, where secular leaders appointed church officials, claiming that only the pope had the authority to appoint bishops. This conflict culminated in the excommunication of Emperor Henry IV, which weakened his authority and led to a significant power struggle between the papacy and the monarchy. Gregory's actions reinforced the idea that the pope held spiritual authority over secular rulers.
The Concordat of Worms, established in 1122, resolved the investiture controversy by distinguishing between spiritual and temporal authority. It granted the Pope the exclusive right to appoint bishops and abbots, while the Holy Roman Emperor retained the power to confer secular authority and lands to these church leaders. This agreement aimed to reduce the ongoing conflict between the church and the monarchy over the appointment of church officials.
The Byzantine army supported the emperor. There was a schism between the Catholic and Orthodox churches in the eleventh century. From that time onward the emperor was seen as the head of the Orthodox church, and the Pope as the head of the Catholic church.