Question: What city in Latvia was ceded by the treaty that ended the Second Northern War?
Sentence (from "Treaty of Oliva"): The Treaty or Peace of Oliva of 23 April (OS)/3 May (NS) 1660 (Polish: "Pokój Oliwski" , Swedish: "Freden i Oliva" , German: "Vertrag von Oliva" ) was one of the peace treaties ending the Second Northern War (1655-1660).
Relevant evidence: Yes