Duke Johann Georg I of Saxe-Weissenfels was a German nobleman born on March 6, 1613. He was a member of the House of Wettin and ruled the duchy of Saxe-Weissenfels from 1656 until his death in 1680. His reign was marked by efforts to stabilize and develop his territory after the disruptions of the Thirty Years' War. Johann Georg I was known for his patronage of the arts and his interest in education. He established several institutions and supported cultural activities, contributing to the intellectual and artistic life of his duchy. His legacy includes a focus on governance that aimed to improve the welfare of his subjects.