Three Crowns, or Tre Kronor, is a national emblem of Sweden. Nominally they are three coronets ordered two above one which is present in the Coat of Arms of the Realm of Sweden. They are often used as a symbol of authority by the Swedish government, but other less formal examples exist such as the national Swedish ice hockey team, which in competing with other nations are both called and wear the "Three Crowns" on their shirts.
See also: Moder Svea, Flag of Sweden