Friedrich II of Prussia, also known as Frederick the Great, was the King of Prussia from 1740 to 1786. He is best known for his military victories, administrative reforms, and promotion of the arts and philosophy. Under his rule, Prussia became a major European power, expanding its territory and influence through successful wars, particularly during the Seven Years' War. Frederick was an enlightened monarch who embraced ideas from the Enlightenment, advocating for religious tolerance and legal reforms. He corresponded with prominent philosophers like Voltaire and implemented policies that improved education and agriculture, leaving a lasting impact on Prussian society and governance.