It was a confrontation between the Holy Roman Empire and the Papacy. Please see the link below.
The Mongolian invasion
The term is the Investiture Controversy,
The Lay Investiture Controversy in medieval Europe was significant because it was a power struggle between the Pope and secular rulers over the appointment of church officials. This conflict highlighted the tension between religious and political authority, ultimately leading to the separation of church and state and the assertion of papal supremacy in matters of church governance.
The politico-religious struggle between Gregory VII and Henry IV is known as the Investiture Contest (or sometimes the Investiture Controversy) but was not limited solely to Henry and Gregory - other Popes/ecclesiastical figures and aristocrats were involved - nor was it even limited to their lifetimes. The Investiture Contest was an 11th-12th century development, and part of what is now often referred to as the Gregorian Reforms. Hope that helps!
The Investiture Controversy or Investiture Contest was the most significant conflict between Church and state in medieval Europe. In the 11th and 12th centuries, a series of popes challenged the authority of European monarchies.
Pope Gregory VII was one of the most prominent opponents of lay investiture during the Investiture Controversy in the 11th century. He believed that only the church had the authority to appoint bishops and saw lay investiture as an encroachment on the church's independence.
d. caused the protestant reformation
He is most famous for the role he played in the Investiture Controversy with Henry IV.
its really hard i need some help please
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.
Lay Investiture is too broad a topic to cover in a quick answer site like WikiAnswers, below are links to articles about it in WikiPedia and the Catholic Encyclopedia.
the weakening and eventual break up of Germany. <----- Study Island