Ernst I of Saxe-Gotha was a German duke born on December 25, 1601. He ruled the duchy of Saxe-Gotha from 1640 until his death in 1675. Ernst I is known for his efforts to promote education and culture in his territory, establishing schools and supporting the arts. During his reign, Ernst I also focused on strengthening the economy of his duchy. He worked to improve agricultural practices and trade, which helped to stabilize the region after the disruptions caused by the Thirty Years' War. His leadership contributed to the development of Saxe-Gotha as a significant cultural and economic center in Germany.