The flag of Denmark is known as the Dannebrog and features a red background with a white cross that extends to the edges of the flag. The cross is called the Scandinavian Cross or Nordic Cross and is centered on the flag. The vertical part of the cross is shifted towards the hoist side of the flag. The origin of the Dannebrog is based on a legendary tale of a battle fought in Estonia in 1219, in which a white cross fell from the sky and gave the Danish soldiers strength to win the battle. Since then, the flag has become an important national symbol of Denmark and is one of the oldest continuously used national flags in the world. The current design was officially adopted in 1625, but variations of the flag have been used since the 14th century.