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Treaty of Oliwa
The Treaty of Oliwa, (also known as Peace of Oliwa, Swedish Freden i Oliva, Polish Pokój oliwski) was a treaty signed by Holy Roman Empire emperor Leopold I, prince-elector Friedrich Wilhelm of Brandenburg-Prussia, Swedens king Charles X of Sweden, and king of Poland John II Casimir of Poland, in Oliwa near Gdansk in Poland), on April 23, 1660. In the treaty the Polish king John II Casimir renounced his claims to the Swedish Crown, which his father Sigismund III had lost in 1599. In it Poland also formally ceded Livonia and the city of Riga, which had already been under Swedish control since the 1620s.
The treaty finally settled conflicts that had been left standing in the War against Sigismund (1598-1599), Polish-Swedish War (1600-1629) and the Northern Wars (1655-1660) between Sweden and Poland.
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