Treaty of Oliva
The Treaty of Oliva, or Peace of Oliva was a treaty signed between Sweden and Poland, at Oliva, near Gdansk in Poland, on April 23, 1660. In the treaty John II of Poland 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 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 War (1600-1629) and the Nordic Wars (1655-1660) between Sweden and Poland.