The Håkon dynasty was a royal family that ruled over Norway during the Middle Ages. It began with Håkon IV, who became king in 1217 and is known for strengthening the monarchy and promoting trade. The dynasty played a significant role in the unification of Norway and its development as a nation. The Håkon dynasty continued through several generations, with notable kings like Håkon V, who reigned from 1299 to 1319. This period saw the establishment of Oslo as the capital and the growth of Norwegian culture. The dynasty eventually ended in the late 14th century, leading to the Kalmar Union with Denmark and Sweden.