King Frederick II, also known as Frederick the Great, was the King of Prussia from 1740 to 1786. He is renowned for his military victories, particularly during the Seven Years' War, which established Prussia as a major European power. Frederick was also a patron of the arts and philosophy, fostering the works of thinkers like Voltaire. Frederick II implemented significant reforms in the Prussian state, including improvements in the legal system and education. He promoted religious tolerance and encouraged agricultural development, which helped modernize the economy. His reign is often seen as a period of enlightenment in Prussia.