II. Louis, full name Louis Honoré Charles Antoine Grimaldi, reigned in Monaco from June 26, 1922 to May 9, 1949. Born July 12, 1870 in Baden-Baden, and died May 9, 1949 in Monaco, he was the son of Prince Albert of Monaco and Mary Victoria Hamilton. Even after the annulment of his parents' marriage, he maintained a good relationship with his mother, Mary Victoria Hamilton, and her new family. II. Lajos often visited Hungary for hunting and family events. The heir to the Monaco throne attended the weddings of all three of his sisters: in 1902 Mária Festetics, in 1905 Alexandra Festetics and in 1924 Karola (Ella) Festetics, he was a guest at the Festetics castle in Keszthely. In May 1922 II. Lajos traveled to Budapest after hearing of his mother's serious illness. He arrived on May 15, but found his mother no longer alive: Mary Victoria Hamilton had died the day before, on May 14. II. Lajos also came to Keszthely for his mother's reburial in November 1925. His stepfather Festetics II participated. Also at the funeral of Prince Taszíló in 1933. He was also on good terms with his younger brother, Festetics III. With George and his family, II. After 1945, Lajos helped his brother's widow, Princess Maria von Haugwitz, and her son Festetics IV. Prince György (1940-). Between 1891 and 1893 he served as an officer in the territory of today's Sudan, then joined the French army. During the First World War, he served as a subordinate to General Franchet d'Espèrey, the Chief of Staff of the 5th French Army. In 1922, he took over the throne of Monaco from his father, Prince Albert I. In 1946, at the age of 76, he married a 46-year-old French actress, Ghislaine Dommanget. Their common child was not born during their marriage. II. During the reign of Prince Louis, Monaco went through important changes, he himself took an active role in shaping the country and international relations. The prince's life and reign are considered an outstanding figure in Monaco and Hungarian history.

II. Prince Louis ascended the throne as Prince of Monaco in 1922 and reigned until his death in 1949. In this period, the Monaco coinage underwent significant changes.II. At the beginning of the reign of Prince Louis, the coins of Monaco were minted at the French mint. However, in 1924 Prince Louis opened his own mint in Monaco. The mint was owned by the government of Monaco and was under the personal supervision of Prince Louis. In the first years of the Monaco mint, gold, silver and copper coins were minted. Gold coins were in denominations of 1, 2, 5, and 10 francs, silver coins were in denominations of 1, 2, 5, and 10 francs, and copper coins were in denominations of 1, 2, and 5 cents. In 1930, Prince Louis decided to convert the Monaco money into to the decimal system. At the same time, the mint received new, more modern equipment. After the introduction of the decimal system, the value of Monaco's money was expressed in francs. Gold coins were in denominations of 10, 20, 50, and 100 francs, silver coins were in denominations of 10, 20, 50, and 100 francs, and copper coins were in denominations of 1, 2, 5, and 10 cents. During World War II, the Monaco mint was suspended. After the war, the mint was restarted and continued minting coins following the previous patterns. II. At the end of the reign of Prince Louis, the Monaco mint contributed significantly to the economy of the duchy. Revenues from coinage were an important source of income for the government.