Duke Karl August of Saxe-Weimar was a German nobleman who ruled from 1775 until his death in 1828. He is known for his progressive policies and support of the arts and education, which helped to foster a cultural renaissance in his duchy. His court became a center for intellectuals and artists, including the famous writer Johann Wolfgang von Goethe. Under his leadership, Saxe-Weimar became a significant cultural hub during the late 18th and early 19th centuries. Karl August was also involved in military affairs, supporting the Napoleonic Wars and aligning with various German states to promote unity and reform. His reign is often remembered for its contributions to German culture and society.