Duchy of Oświęcim
In 1457, duke Jan IV of Oświęcim agreed to sell the Duchy of Oświęcim to the Polish Crown, and in the accompanying document issued on 21 February the settlement was mentioned in Old Polish language "Wylamowycze". It was not, however, until 1564, at the General sejm, that King Sigismund II Augustus issued privileges of incorporation, recognizing the Duchy of Oświęcim as part of the Polish Crown into the Silesian County of the Kraków Voivodeship.