Pope Gregory VII, also known as Hildebrand, was the head of the Roman Catholic Church from 1073 to 1085, known for his role in the Investiture Controversy, which was a significant conflict between church and state in medieval Europe. His papacy marked a critical turning point in establishing papal authority over secular rulers, emphasizing the church's independence from political influence and the moral obligation of rulers to respect ecclesiastical power. Gregory's reforms aimed to purify the church and restore its spiritual authority.
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