Haakon IV was the King of Norway from 1217 until his death in 1263. He is known for strengthening the monarchy and expanding Norway's influence in the North Atlantic. His reign marked a period of relative peace and stability, allowing for economic growth and the establishment of trade routes. During his rule, Haakon IV also focused on consolidating power and unifying the various regions of Norway. He was involved in conflicts with neighboring kingdoms, particularly Sweden and Denmark, but he successfully maintained Norway's independence and territorial integrity throughout his reign.