Frederick Augustus I

Frederick Augustus I, 1750–1827, king and elector of Saxony

Frederick Augustus I, 1750–1827, king (1806–27) and elector (1763–1806) of Saxony, grand duke of Warsaw (1807–14). He sided with the allies in the French Revolutionary Wars and joined Prussia in the campaign of 1806 against the French emperor Napoleon I. However, after the French victory at Jena he made a separate peace with Napoleon, with whose approval he took the title king of Saxony. Napoleon also made him nominal ruler of the grand duchy of Warsaw. Frederick Augustus did not abandon his alliance with Napoleon in time and as a result lost a large part of Saxony to Prussia at the Congress of Vienna (1815).

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Frederick Augustus I, 1670–1733, elector of Saxony

Frederick Augustus I, elector of Saxony: see Augustus II, king of Poland.

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Frederick Augustus I 

Born Dec. 23, 1750, in Dresden; died there May 31, 1827. King of Saxony from 1806; elector of Saxony (as Frederick Augustus III) from 1768 to 1806.

In 1806, Frederick Augustus announced his support for Prussia in the war with Napoleonic France; after the defeat of the Prussian troops at Jena in October 1806, however, he sided with Napoleon I. He was a member of the Rhenish Confederation of 1806–13. In 1806, Frederick Augustus received the title of king from Napoleon, and in 1807 he received the title of grand duke of Warsaw. He was taken prisoner by Prussian troops in 1813. In accordance with a decision of the Congress of Vienna (1814–15), Frederick Augustus ceded almost half of his kingdom to Prussia.