フリードリヒ大王, also known as Frederick the Great, was the King of Prussia from 1740 to 1786. He is known for his military successes, particularly during the 七年戦争 (Seven Years' War), which helped establish Prussia as a major European power. Frederick implemented various reforms in the military and government, promoting efficiency and modernization. In addition to his military achievements, Frederick was a patron of the arts and philosophy. He corresponded with notable thinkers like ヴォルテール (Voltaire) and supported the development of culture in his kingdom. His reign is often associated with the Enlightenment, as he encouraged religious tolerance and education.