"For the Swedish-Habsburg convention regarding Silesian Protestants, see Treaty of Altranstädt (1707).
The Treaty of Altranstädt was concluded between Charles XII of Sweden and Augustus the Strong ...
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of Saxony and Poland–Lithuania, on 13 October 1706, during the Great Northern War. Augustus had to renounce his claims to the Polish throne and his alliance with Russia." - (en.wikipedia.org 02.04.2021)