Olaf I of Denmark, also known as Olaf I Tryggvason, was a king who ruled Denmark in the early 11th century. He was a member of the royal family and is often associated with the spread of Christianity in the region. His reign is noted for efforts to consolidate power and strengthen the kingdom. Olaf I's rule was marked by conflicts with neighboring territories and internal challenges. He was eventually succeeded by Cnut the Great, who would go on to become a significant figure in Scandinavian history. Olaf's legacy is intertwined with the early formation of a unified Danish state.