Frederick II, also known as Frederick the Great, was the King of Prussia from 1740 to 1786. He was a highly influential and successful military leader, known for his strategic prowess and military reforms. Frederick was also a patron of the arts and a proponent of Enlightenment ideals, promoting religious tolerance and education. His reign saw significant expansion of Prussian territory and influence in Europe. He is often remembered as one of the most prominent figures of the Enlightenment era and a key figure in European history.