Tre Kronor, or "Three Crowns," is a national symbol of Sweden. It represents the unity of the three historical kingdoms: Sweden, Norway, and Finland. The emblem is often seen on the royal coat of arms and is associated with the Swedish monarchy. The symbol has a rich history, dating back to the late Middle Ages. It is commonly used in various contexts, including sports, where it represents the Swedish national ice hockey team. The three crowns are also featured in the design of the Swedish flag and other national insignia.