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Hace 20 horas · The Landgraviate of Hesse-Darmstadt was promoted to a grand duchy and Louis X thereafter styled himself Grand Duke Louis I (German: Großherzog Ludewig I., with an extra 'e') and announced not only the promotion, but also the territories he had received under the Treaty of the Confederation of the Rhine in an edict on 13 August 1806.
