William's religious beliefs were in line with the Catholic Church of his time. He believed in the divinity of Jesus Christ, the Trinity, and the authority of the Pope. He also supported the sacraments and the veneration of saints.
William's religious views had a significant impact on his policies and actions as king. He used religion to justify his conquest of England and to consolidate his power. He also sought to spread Christianity among his subjects and to reform the English church.
Overall, William the Conqueror was a devout Christian who used his religious beliefs to shape his personal life and his political policies.