Johann George I of Saxe-Weissenfels was a German nobleman born on March 6, 1648. He was a member of the House of Wettin and ruled as the Duke of Saxe-Weissenfels from 1680 until his death in 1712. His reign was marked by efforts to strengthen his duchy and improve its economy. He was the son of Johann Georg I of Saxe-Weissenfels and Anna Maria of Saxe-Weimar. Johann George I was known for his patronage of the arts and his interest in education, contributing to the cultural development of his territory. His legacy includes the establishment of institutions that promoted learning and the arts.