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 Vienna (1657)"): The Treaty of Vienna, concluded on 27 May 1657, was an Austro–Polish alliance during the Second Northern War.
Relevant evidence: Yes