The Grand Duchy of Saxe-Weimar-Eisenach was a historical state in Germany, established in 1815 after the Congress of Vienna. It was part of the larger region of Thuringia and included the cities of Weimar and Eisenach. The grand duchy was known for its cultural contributions, particularly in literature and the arts, during the 19th century. The ruling family, the House of Wettin, played a significant role in the duchy's development. Notable figures associated with the region include the famous writer Johann Wolfgang von Goethe and composer Richard Wagner. The grand duchy existed until 1918, when it became part of the newly formed Weimar Republic.