There were many times when kings or emperors tried to take power away from the Church. One way they did this was to insist that they had the right to appoint bishops or even popes, and the question of whether the kings could do this was called the Investiture Controversy. When they tried to appoint bishops, they got away with it, sometimes, for a while. They even succeeded in appointing their own popes, though doing so split the Church in what was called the Great Schism of the West.
There were many kings and emperors who ran antagonized popes and found it was a big mistake. The problem they had was that the whole fabric of society was regulated by oaths, which were effectively binding contracts, and which could only be nullified by permission from the Church. Everything, from the support the nobility gave to the kings, to treaties the kings had with each other, could be rendered invalid, if a king was excommunicated. Since every king had his enemies, having this happened could cause rebellions and invasions. Great kings like Henry II of England, King John of England, and Emperor Henry IV of the Holy Roman Empire both suffered from this sort of problem. In the case of King John, the result was sufficiently difficult that he allowed himself to become a vassal of the pope to get out of it.
On the other hand, the Church had little secular power. It usually had no military to command, and was at the mercy of the kings to some degree. When Pope Leo III was attacked by a mob that was enraged at his election, because his father was an ordinary farmer, Charlemagne had to send a military force to come to his rescue.
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The medieval church used its religious power to manipulate people into thinking that if they did not do what the church mandated, they would go to hell. The church took advantage of the superstitious people and medieval kings and used its religious power to take over the world. Power in the middle ages was used and abused the same as it is today - the rich and powerful do as they want, and the lesser people get trampled on.
A section on medieval church power in a textbook might include items such as the role of the Pope as a spiritual and temporal leader, the establishment of church doctrines and their influence on society, the church's involvement in political affairs and conflicts, such as the Investiture Controversy, and the impact of monasticism on education and culture. Additionally, it could cover the church's wealth and land holdings, the Crusades as an extension of church authority, and the relationship between church and state during this period.
The Catholic Church
Church Laws
The church was Catholic so it was the Pope and the priests.
The Church and the nobility.
Because they were in control of the London Mafia
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church
In medieval Europe the Roman Catholic Church experienced an affect on its power due to two reasons. The first was the discovery and conquest of the Americas. The second was the Protestant Reformation.
The medieval church used its religious power to manipulate people into thinking that if they did not do what the church mandated, they would go to hell. The church took advantage of the superstitious people and medieval kings and used its religious power to take over the world. Power in the middle ages was used and abused the same as it is today - the rich and powerful do as they want, and the lesser people get trampled on.
the church
I would consider many since the christian church was mostly in power during that time.
The liturgical language used by the medieval Christian church was Latin.
The Catholic Church
Church Laws