Franz Bonaventura Adalbert Maria Herzog von Bayern (born 14 July 1933), commonly known by the courtesy title Duke of Bavaria, is the head of the House of Wittelsbach, the former ruling family of the Kingdom of Bavaria. His great-grandfather King Ludwig III was the last ruling monarch of Bavaria, being deposed in 1918. Franz was born in Munich. During the Second World War, the Wittelsbachs were anti-Nazi. The family initially left Nazi Germany for Hungary but were eventually arrested when Germany invaded the country in 1944. Franz was 11 at the time. He spent time in several Nazi concentration camps, including Sachsenhausen concentration camp, then Flossenbürg concentration camp and finally Dachau. After the war, Franz was a student at the University of Munich and became a collector of modern art. Franz succeeded as head of the House of Wittelsbach, and as pretender to the Bavarian throne, on the death of his father in 1996. He lives at Nymphenburg Palace in Munich and Berg Palace. Birth Franz was born on 14 July 1933 in Munich, the son of Albrecht, Duke of Bavaria, and his morganatic wife, Countess Maria Draskovich of Trakostjan of the House of Drašković, a Croatian noble family. On 18 May 1949, when Franz was 15, his grandfather Crown Prince Rupprecht recognised the marriage of Franz's parents as dynastic, and Franz became a prince of Bavaria. The Wittelsbach dynasty were opposed to the Nazi regime in Germany, and in 1939, Franz's father took his family to Hungary. They lived in Budapest for four years before moving to their Castle at Sárvár in late 1943. In March 1944, Nazi Germany occupied Hungary, and on 6 October 1944 the entire family, including the 11-year-old Franz, were arrested. They were sent to a series of Nazi concentration camps, including Oranienburg and Dachau. At the end of April 1945, they were liberated by the United States Third Army. Education After the war, Franz received his secondary education at the Benedictine Abbey of Ettal. He then studied business management at the University of Munich and in Zurich. Franz developed a passion for collecting modern art. Items from his private collection are on permanent loan to the Pinakothek der Moderne in Munich. He is also an honorary trustee of the Museum of Modern Art in New York. Current activities His 80th birthday party, in 2013, was held at the Schleissheim Palace near Munich. The party