Ernst I, Duke of Saxe-Hildburghausen was a German nobleman born on December 25, 1681. He became the Duke of Saxe-Hildburghausen in 1745 and ruled until his death in 1748. His reign was marked by efforts to improve the economy and infrastructure of his duchy, which was part of the larger Saxony region. During his rule, Ernst I focused on promoting education and the arts, contributing to the cultural development of his territory. He was known for his diplomatic skills and maintained good relations with neighboring states, which helped stabilize his duchy during a time of political change in Europe.