 During his reign, Napoleon I established his cavalry officers training school in the Château-Vieux.The Treaty of Saint-Germain was signed in 1919 and was applied on 16 July 1920.The treaty officially registered the breakup of the Habsburg empire, which recognized the independence of Czechoslovakia, Poland, Hungary, and the Kingdom of the Serbs, Croats, and Slovenes (Yugoslavia).<ref>Encyclopædia Britannica "Treaty of Saint-Germain", retrieved from Britannica.com.</ref>

During the occupation from 1940 to 1944, the town was the headquarters of the German Army .