Peter the Great was the great reformer of Russian state. Being educated on the West he tried to modernize the state according to the experiences from Western Europe. Even the reforms in the church were influenced by his experience in that area.
Explanation:
He reorganized Russian governing system, divided the country, but also introduced the reforms in the church. He wanted to participate more in the church affairs, and because of that he was sometimes even rebuked by the church leaders. Still, his reforms in the country led to spreading of Russian power.