Dannebrog is the Danish flag traditionally said to have fallen from the sky during the Battle of Valdemar in 1219.
The legend says that a red flag with a white Nordic cross descended during Denmark’s campaign in Estonia and gave King Valdemar II’s forces a sign of divine support. Historians do not treat the skyfall story as established evidence, and the earliest written versions appeared centuries after the supposed event.
The flag’s white cross on a red field is the model for the Nordic cross design used by several Scandinavian and Nordic countries. Denmark’s version is often regarded as the oldest continuously used national flag, although the precise early history of its design is difficult to document.
Dannebrog means “Danish cloth” or “Danish banner.” Its cross pattern influenced the flags of Sweden, Norway, Finland, and Iceland, though each uses different colors and historical symbolism.