King Harald Fairhair, also known as Harald I of Norway, was a Viking king who reigned in the late 9th century. He is often credited with unifying Norway into a single kingdom. His reign marked the beginning of the Viking Age in Norway, and he is remembered for his military conquests and strong leadership. Harald Fairhair is famous for his long hair, which he kept uncut until he became king. This earned him the nickname "Fairhair." His legacy includes the establishment of a centralized monarchy in Norway, influencing future rulers and shaping the country's history.