Mezue ahịrịokwu na-esonụ: N'afọ 1804, Duke Charles Augustus banyere na ndọrọ ndọrọ ọchịchị Europe site n'ịlụ nwa ya nwoke na onye nketa Charles Frederick na Grand Duchess Maria Pavlovna, nwanne nwanyị Emperor Alexander nke Mbụ nke Russia. Otú ọ dị, n'otu oge ahụ ọ sonyeere Prussia na
Agha nke Njikọ nke Anọ megide Alaeze Ukwu France, na mgbe e merisịrị n'agha nke Jena-Auerstedt, a manyere ya isonye na Napoleon Confederation nke Rhine na 1806. N'afọ 1809 Saxe-Weimar na Saxe-Eisenach, bụ ndị e jikọtara naanị na onye nke duke, jikọtara n'ụzọ iwu na Duchy nke Saxe-Weimar-Eisenach.