Brno, 1372: Wenceslaus King of Bohemia , Margrave of Brandenburg and Duke of Silesia agree that after the death of John the Younger Duke of Auschwitz , if he dies without heirs, the Duchy of Auschwitz , as a fief of the Czech crown , would be passed on Premysl Duke of Cieszyn https://polona.pl/

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Brno, 1372: Wenceslaus King of Bohemia