Karl August, Grand Duke of Saxe-Weimar-Eisenach

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Charles Augustus
Portrait by Heinrich Christoph Kolbe, 1822
Grand Duke of Saxe-Weimar-Eisenach
Reign	9 June 1815 – 14 June 1828
Predecessor	Raised from duchy
Successor	Charles Frederick
Duke of Saxe-Weimar-Eisenach
Reign	20 September 1809 – 9 June 1815
Predecessor	New creation from personal union
Successor	Raised to grand duchy
Duke of Saxe-Weimar
Reign	28 May 1758– 20 September 1809
Predecessor	Ernest Augustus II
Successor	Union with Saxe-Eisenach
Regent	Dowager Duchess Anna Amalia
Duke of Saxe-Eisenach
Reign	28 May 1758– 20 September 1809
Predecessor	Ernest Augustus II
Successor	Union with Saxe-Weimar
Regent	Dowager Duchess Anna Amalia
Born	(1757-09-03)3 September 1757 Weimar, Duchy of Saxe-Weimar, Holy Roman Empire (now in Thuringia, Germany)
Died	14 June 1828(1828-06-14) (aged 70) Graditz, near Torgau, Province of Saxony, Kingdom of Prussia (now in Saxony, Germany)
Spouse	Landgravine Louisa of Hesse-Darmstadt ​ ​ (m. 1775)​
Issue	Princess Luise Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach Caroline Louise, Hereditary Grand Duchess of Mecklenburg-Schwerin Prince Bernhard
House	Saxe-Weimar-Eisenach
Father	Ernest Augustus II, Duke of Saxe-Weimar and Saxe-Eisenach
Mother	Duchess Anna Amalia of Brunswick-Wolfenbüttel
Religion	Lutheranism

Karl August, sometimes anglicised as Charles Augustus (3 September 1757 – 14 June 1828), was the sovereign Duke of Saxe-Weimar and of Saxe-Eisenach (in personal union) from 1758, Duke of Saxe-Weimar-Eisenach from its creation (as a political union) in 1809, and grand duke from 1815 until his death. He is noted for the intellectual brilliance of his court.^[1]