Gustav II Adolf (9 December 1594 – 6 November 1632, O.S.); widely known in English by his Latinised name Gustavus Adolphus or as Gustav II Adolph, or as Gustavus Adolphus the Great (, , a formal posthumous distinction passed by the Riksdag of the Estates in 1634); was the King of Sweden from 1611 to 1632 and is credited as the founder of Sweden as a Great Power . He led Sweden to military supremacy during the Thirty Years War, helping to determine the political as well as the religious balance of power in Europe.