Question: The Treaty of Vienna, concluded on 27 May 1657, was an Austro–Polish alliance during the Second Northern War, the House of Habsburg, also called House of Austria, was one of the most influential and outstanding royal houses of where?
Sentence (from "Treaty of Copenhagen (1660)"): The Treaty of Copenhagen was signed on 27 May 1660, and marked the conclusion of the Second Northern War between Sweden and the alliance of Denmark-Norway and the Polish-Lithuanian Commonwealth.
Relevant evidence: No