Which of the following leaders is known for promoting Enlightenment ideas in Europe?

Frederick II of Prussia, also known as Frederick the Great, is recognized for promoting Enlightenment ideas in Europe due to his administrative reforms, support of the arts and sciences, and advocacy for education. He embraced the principles of rationalism, individual rights, and secular governance, which were significant elements of the Enlightenment movement. Frederick implemented reforms in legal systems and religious toleration, and he corresponded with prominent Enlightenment philosophers like Voltaire, further illustrating his commitment to these ideals. His reign marked a blend of absolute monarchy and Enlightenment principles, making significant strides in the modernization of his state and the promotion of intellectual thought.