What church powers did Pope Gregory use against Henry to exert "power" over him?

The conflict between Henry IV and Gregory VII concerned the question of who got to appoint local church officials. Henry believed that, as king, he had the right to appoint the bishops of the German church. This was known as lay investiture.

Explanation:

A code of behavior for knights in medieval Europe, stressing ideals such as courage, loyalty, and devotion. How did Pope Gregory show his power in political affairs? Under Gregory, the papacy also became a secular, or worldly, power involved in, they used church revenues to raise armies, repair road, and help the poor.

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