Prince Ernő I was born on January 2, 1784 in Coburg, in the Duchy of Saxe-Coburg-Saalfeld. He was the eldest son of Prince Francis of Saxe-Coburg-Saalfeld and Countess Augusta Reuss-Ebersdorf, the elder brother of Princess Victoria of Saxe-Coburg-Saalfeld and King Leopold I of Belgium. Duke of Saxe-Coburg-Saalfeld (1806-1826): in 1806, the death of his father inherited the Duchy of Saxe-Coburg-Saalfeld. During his reign, the duchy developed significantly economically and culturally. Duke of Saxe-Coburg-Gotha (1826-1844): In 1826, he united his possessions with the neighboring Duchy of Gotha, thus forming the Duchy of Saxe-Coburg-Gotha. He became the first ruler of the new duchy. He supported art and sciences. He modernized the duchy's army and administration. He developed the education system. He had new roads and railways built. In 1819, he married Princess Karolina Lujza of Saxe-Weimar. Nine children were born from their marriage, including Prince Albert of Saxe-Coburg-Gotha, who later became the husband of British Queen Victoria. I. Prince Ernő died on January 29, 1844 in the city of Gotha. After his death, his eldest son, Albert, succeeded him on the throne. During the reign of Ernő I, the Duchy of Saxe-Coburg-Gotha was one of the most important German states.一I. Prince Ernő was a passionate hunter. He received numerous awards, including the Order of St. George and the Order of the Golden Fleece. His descendants also reigned on the thrones of Belgium, Bulgaria, Portugal and the United Kingdom.

The coinage of Duke Ernő I in the Duchy of Saxe-Coburg-Saalfeld (1806-1826), during his reign there was a lively minting activity in the Duchy of Saxe-Coburg-Saalfeld. The duke introduced new coins, improved the quality of the coinage, and introduced strict control over money circulation. During the reign of Duke Ernő, gold ducats and half ducats were minted. These coins were of high quality and were widely used in trade. Silver thalers, half thalers and garas were also minted. These coins were the most common in everyday use. Copper krajcárs and pfennings were also minted. These smaller coins were the most suitable for everyday purchases. Prince Ernő placed great emphasis on improving the quality of the coinage. He acquired new mints and introduced a strict control system to the minting process. As a result, the coins minted in the Duchy of Saxe-Coburg-Saalfeld were of high quality and reliable. The duke introduced strict control over the circulation of money. He banned counterfeiting and severely punished counterfeiting. He also made arrangements to cover the old, worn coins and replace them with new coins.I. Prince Ernő's coinage had a significant impact on the economy of the Duchy of Saxe-Coburg-Saalfeld. A stable monetary system facilitated trade and investment and contributed to the duchy's economic growth.