III. Leopold, royal prince of Belgium from the House of Saxe-Coburg-Gotha, duke of Brabant, heir to the throne, and then king of Belgium, was the fourth ruler of Belgium. His reign lasted from 1934 to 1951. Prince Leopold was born on November 3, 1901 in Brussels. He was the first child of Prince Albert, later King Albert I of Belgium, and Princess Elisabeth of Bavaria (later Queen of Belgium). In 1934, III. He became the ruler of Belgium under the name of Leopold. However, his collaborative activities during World War II compromised him politically. In June 1944, after the Normandy landings, he was deported to Germany on Himmler's orders. Although he was liberated by American troops in 1945, he was not allowed to return to Belgium. In 1944, his younger brother, Károly Teodor, Duke of Flanders, was appointed Regent of Belgium in his place, who was the head of the country in his brother's name until 1950. Albert then returned to Brussels, but his person triggered a political crisis, mass protest demonstrations and a nationwide general strike. On July 16, 1951, Albert was forced to resign, and his son, Prince Baldwin of Brabant, took his place the next day, on the 17th. 1983. He died on September 25. The place of his death was Sint-Lambrechts–Woluwe, Belgium. 1926. On November 4, he married Swedish Royal Princess Astrid in Stockholm. Three children were born from their marriage: Royal Princess Jozefina Sarolta (1927–2005), by marriage Grand Duchess of Luxembourg and Titular Duchess of Nassau. Royal Prince Baldwin (1930–1993), Duke of Flanders, King of Belgium from 1951. Royal Prince Albert (1934), Liège Prince of Belgium, since 1993 as his brother's heir, King of Belgium.

III. King Leopold of Belgium reigned from 1934 to 1951. During the Second World War, during the German occupation, the Belgian treasury lost a significant amount of gold and currency. After the war, the royal court had to rebuild the royal mint, which suffered significant damage during the war. The royal mint resumed operations in 1945, and III. Under Lipót, the following coins and banknotes were issued: 1, 2, 5, 10, 25, 50, 100, 200, 500 and 1000 franc coins and 10, 20, 50, 100, 500 and 1000 franc banknotes. The post-war coins and banknotes depicted the coat of arms of the royal family and the portrait of the king. The mint also used modern technologies, such as electric pressing and vacuum-steam column alloying. III. Lipót's coinage is an important part of Belgian history. The mint managed to recover from the damage after the Second World War, and new, modern coins and banknotes were put into circulation.