Olaf Tryggvason was a king of Norway who reigned from 995 to 1000 AD. He is known for his efforts to convert Norway to Christianity and for unifying the country under a single rule. Olaf was born around 963 and was a descendant of the famous Viking leader Harald Fairhair. His reign was marked by military campaigns and the establishment of trade routes. During his rule, Olaf Tryggvason faced challenges from rival factions and foreign powers, including the Swedish and Danish kings. He is remembered for his bravery and leadership, as well as for his role in promoting Christianity in Norway, which had a lasting impact on the region's culture and society.