He was William I, the first King of the Netherlands and the first Grand Duke of Luxembourg. He was born on August 24, 1772 in The Hague and died on December 12, 1843 in Berlin.I. William was the eldest son of the last Stadhouder of the Dutch United Provinces, Prince William V of Orange and his wife Vilma of Hohenzollern. After the defeat of the Batavia revolution, he studied at a German military academy and visited European royal courts. After Napoleon's exile, in 1813, he was elected the reigning prince of the United Netherlands, and in 1815 he proclaimed himself king. The separation of Belgium from the Netherlands took place during his reign. In 1840, his son, II. In favor of Vilmos. His wife was Vilma Hohenzollern, with whom they had several children, including II. King William of the Netherlands and Prince Frederick of the Netherlands.I. William's reign brought significant changes to the history of the Netherlands and the surrounding areas, and his decisions shaped the region's modern history.

King William I of the Netherlands issued several coins between 1815 and 1840. The gulden or florin was made of silver and weighed 28.25 grams. On one side was the portrait of the king and on the other side was the coat of arms of the Netherlands. The stuiver, which was made of copper and weighed 5.4 grams. On one side was the monogram of the king, and on the other side was the year and the value of the coin. Its double, which was made of silver, weighed 1.41 grams. On one side was the monogram of the king, and on the other side was the year and the value of the coin. The cent, which was made of copper and weighed 1.88 grams. On one side was the monogram of the king, and on the other side was the year and the value of the coin. In addition to these, he also issued other coins, such as ducats made of gold or rijksdaalders made of silver. The coins were usually decorated with the Dutch coat of arms or the king's motto, which read: "Je maintiendrai", meaning "I persevere".I. Coinage reforms created by William ensure the stability of the Dutch economy and the strengthening of the currency during the period.