John I, full name Jean Benoît Guillaume Robert Antoine Louis Marie Adolphe Marc d'Aviano, was the fifth monarch of the House of Nassau-Weilburg and Grand Duke of Luxembourg from 12 November 1964 to 7 October 2000. Grand Duke János was born on January 5, 1921 in Berg Castle in Luxembourg. His parents were Duke Félix of Bourbon-Parma and Grand Duchess Sarolta of Luxembourg. He went to primary school in Luxembourg and then finished his high school studies at a college in the United Kingdom. During the Second World War, the Germans occupied Luxembourg and the Grand Ducal family fled to Portugal. Prince John studied at Université Laval in Quebec City. Later, as an Irish Guardsman, he participated in the Normandy landings, and then arrived in Luxembourg at the head of the British liberation troops. In 1953, Grand Duke János married Princess Józefína-Šarlotta of Belgium. The two raised a total of five children: Grand Duke Henrik: He became the next ruler of Luxembourg after John's abdication, Princess Mária Anett: She is their eldest daughter and one of the most active members of the family, Princess Mária Theresa: She is their second daughter and is interested in the arts , Prince George: He is their third son and a lover of sports and culture, Prince János: He is their youngest son and is interested in science and technology. There was a strong family bond between János and Józefína-Šarlotta. The Grand Duke and Grand Duchess often attended joint events and supported each other both in their private lives and in their official duties. Grand Duke János was famous for his good humor and directness, which contributed to the family atmosphere. In 1964, Grand Duchess Sarolta abdicated in favor of him, and Grand Duke János took an active part in public life. He became the president of the Luxembourg Olympic Committee and was also included in the presidency of the International Olympic Committee. During his reign, he turned Luxembourg into an international financial center. In his spare time, Grand Duke John liked to ski, ride and hunt. His hobbies were music, collecting art and gardening. He abdicated the title in 2000 and his eldest son Henrik took the throne. His long and interesting life left a worthy memory in Luxembourg and throughout the world. Died April 23, 2019 (aged 98) in Luxembourg, Luxembourg, buried in Notre-Dame Cathedral.

Grand Duke János ascended the throne in 1964 and ruled until 2000. During this period, the Luxembourg Mint issued a number of new coins depicting the portrait of Grand Duke John. The very first such coin was the 10 franc minted in 1964. This was followed by the 20-franc, 50-franc, 100-franc and 500-franc coins. The 20-franc coin appeared in 1966, the 50-franc coin in 1967, the 100-franc coin in 1968, and the 500-franc coin in 1970. In the 1970s, the Luxembourg Mint issued new coins on which János in addition to the portrait of the Grand Duke, the coat of arms of the country was also included. These coins were the 10-franc, 20-franc, 50-franc, 100-franc, and 500-franc coat-of-arms versions. In the 1980s, Luxembourg issued new coins that, in addition to the portrait of Grand Duke John, also featured the country's coat of arms and the Grand Duke's monogram. featured. These coins were monogrammed versions of 5 francs, 10 francs, 20 francs, 50 francs, 100 francs and 500 francs. In the 1990s, the mint minted new coins, on which, in addition to the portrait of Grand Duke János, the country's coat of arms and the grand duke's monogram was also included. These coins were monogrammed versions of 2 francs, 5 francs, 10 francs, 20 francs, 50 francs, 100 francs and 500 francs. Grand Duke John abdicated in 2000 and was succeeded by his son Grand Duke Henrik . However, the Luxembourg Mint continues to mint coins with the portrait of Grand Duke John, which are called commemorative coins. Luxembourg coins with the portrait of Grand Duke John are popular among collectors. These coins are important monuments of Luxembourg history and culture.