The history of Danish Kings dates back to the Viking Age, with notable rulers like Harald Bluetooth, who united Denmark and introduced Christianity in the 10th century. The monarchy has evolved over the centuries, transitioning from a tribal leadership to a more centralized royal authority. Today, the Danish monarchy is one of the oldest in the world, with Queen Margrethe II as the current monarch. The royal family plays a ceremonial role in modern Denmark, representing the nation at various events and promoting cultural heritage while maintaining a constitutional framework.