Frederick Augustus I of Saxony
![](/Images/godic/202501/14/Fryderyk_August_I0127.jpg")
![Frederick Augustus in 1795](/Images/godic/202501/14/Kurfürst_Friedrich_August_III._von_Sachsen,_genannt_der_Gerechte0127.jpg")
![Coat of arms of Saxony and the Duchy of Warsaw](/Images/godic/202501/14/Armoiries_Saxe.svg0127.png")
![Duchy of Warsaw](/Images/godic/202501/14/Grand_Coat_of_Arms_of_Duchy_of_Warsaw.svg0127.png")
Frederick Augustus I (full name: Frederick Augustus Joseph Maria Anthony John Nepomuk Aloysius Xavier; German:Friedrich August Josef Maria Anton Johann Nepomuk Alois Xavier; Polish:Fryderyk August Józef Maria Antoni Jan Nepomucen Alojzy Ksawery Wettyn; 23 December 1750 – 5 May 1827) was King of Saxony (1805–1827) from the House of Wettin. He was also Elector Frederick Augustus III (Friedrich August III.) of Saxony (1763–1806) and Duke Frederick Augustus I (Polish:Fryderyk August I) of Warsaw (1807–1813).