King of Norway (1202–1204), son of Sverre, who made peace with the Church after his father's long conflict, then died young amid rumours of poison — leaving the unborn Haakon IV.
Håkon III Sverresson was king of Norway from 1202 to 1204. The son of the great warrior-king Sverre, he inherited a realm still torn by the civil wars and, above all, by the bitter conflict between his father and the Church, which had left Sverre excommunicated and the country under interdict.
Håkon's brief reign was defined by reconciliation: he made peace with the exiled bishops and lifted the shadow of the Church's ban, winning wide popularity. But he died suddenly on New Year's Day 1204, only about twenty-seven, amid persistent rumours that he had been poisoned. His death without a recognised heir was momentous, for his mistress Inga of Varteig was pregnant with the boy who would become Haakon IV.
Håkon was born about 1177, a son of Sverre Sigurdsson, in the years when Sverre was fighting his way from landless pretender to king of Norway. He grew up amid the Birkebeiner cause and the ceaseless warfare of his father's reign, and on Sverre's death in 1202 he succeeded to the throne.
He inherited not only the crown but its great unresolved quarrel: Sverre had defied the Church, been excommunicated, and driven the bishops into exile, so that Håkon came to power with the kingdom still under a papal interdict.
Håkon III is remembered as a conciliator, a marked contrast to his combative father. Where Sverre had fought the Church to a standstill, Håkon chose to heal the breach, and the sources credit him with the good sense and popularity of a king who preferred to end conflicts rather than prolong them.
The saga tradition treats him warmly, as a young ruler of promise cut off too soon. His willingness to make peace with the bishops, even at the cost of conceding some of what his father had fought for, suggests a pragmatic temperament that valued stability over vindication — the outlook of a king trying to close, rather than extend, the wounds of a generation of civil war.
Håkon's central act was to make peace with the Church. He recalled the exiled bishops, reached a settlement that ended the interdict, and restored the crown's standing with Rome, undoing the isolation of his father's last years. The reconciliation was popular and seemed to promise a more peaceful reign.
It was cut brutally short. On 1 January 1204 Håkon died suddenly at Bergen. Rumour at once blamed poison, and suspicion fell on his stepmother, Sverre's widow Margaret of Sweden, though nothing was proven. He left no legitimate heir — but his mistress, Inga of Varteig, was pregnant, and the child she bore later that year would be recognised as his son.
Håkon's unexpected death threw the succession open. The Birkebeiner first raised his young kinsman Guttorm Sigurdsson, a child who reigned only a few months before dying, and then chose Inge II Bårdsson as king. Håkon's own posthumous son, born to Inga of Varteig, would be brought up in obscurity and danger before emerging, years later, as King Haakon IV.
Håkon III's short reign mattered out of all proportion to its length. His reconciliation with the Church repaired the great rupture of his father's day, and his posthumous son Haakon IV would go on to end the civil wars for good and lead Norway into its medieval golden age. Håkon III thus stands as the bridge between Sverre's embattled kingship and the settled, powerful monarchy of his own son.