title: Swedish Empire
context: The Swedish Empire (Swedish: Stormaktstiden, "the Era of Great Power") was a European great power that exercised territorial control over much of the Baltic region during the 17th and early 18th centuries.[1] The beginning of the Empire is usually taken as the reign of Gustavus Adolphus, who ascended the throne in 1611, and the end as the loss of territories in 1721 following the Great Northern War.[1]
question: Who started the Swedish Empire?
answers: Gustavus Adolphus