Haakon V Magnusson (10 April 1270 – 8 May 1319) ( Old Norse : Hákon Magnússon ; Modern Norwegian : Håkon Magnusson ) was King of Norway from 1299 until 1319. He was the younger son of King Magnus VI and succeeded his elder brother Eric II . His reign marked the end of the "golden age" of medieval Norwegian history. [ 2 ] During his reign, Haakon sought to strengthen royal authority and the central administration, while Oslo grew in importance as a royal and administrative centre. He also oversaw the construction and strengthening of major fortifications, including Akershus Fortress and Bohus Fortress . [ 3 ] Haakon was the last king in the male line of the House of Sverre . As he had no legitimate sons, he was succeeded in 1319 by his grandson Magnus Eriksson , who was also king of Sweden. [ 3 ] Haakon was the younger surviving son of Magnus the Lawmender, King of Norway , and his wife Ingeborg of Denmark . Through his mother, he was a descendant of Eric IV , king of Denmark. In 1273, his elder brother, Eirik , was named junior king under the reign of their father, King Magnus. At the same time, Haakon was given the title "Duke of Norway", and from his father's death in 1280, ruled a large area around Oslo in Eastern Norway and Stavanger in the southwest, subordinate to King Eirik. [ 4 ] Haakon succeeded to the royal throne when his older brother died without sons. Haakon's eldest daughter was Princess Agnes Haakonsdatter , [ 5 ] born out of wedlock in 1290 to Gro Sigurdsdatter, daughter of Sigurd Lodinsson and wife Baugeid Steinarsdatter. [ 6 ] In 1295, Haakon married his first wife, Isabelle, daughter of Jean I, Count of Joigny, but she died in 1297 without children. In early 1299 he married his second wife, Euphemia , daughter of Vitslav II, Prince of Rügen . In 1301 she bore Haakon his younger daughter, Ingeborg Håkonsdotter . Since Haakon had not officially married Princess Agnes's mother, it was eventually decided that for political concerns, Princess Ingeborg's descendants were to be moved one step up the list of inheritance and Princess Agnes's descendants were to be moved one step down. This meant that the Norwegian throne would be passed first through the younger sister Ingeborg Haakonsdatter, but that Princess Agnes and her descendants still remained rightful heirs to the throne, if Ingeborg's line failed. It did not, however. In 1312 Ingeborg married duke Eric Magnusson of Sweden , a younger brother of King Birger of Sweden , and their son, Magnus Eriksson , would succeed Haakon V as king of Norway. [ 7 ] During Haakon's reign, Oslo gradually took over the functions of capital of Norway from Bergen , though there was no official pronouncement of this at any time. Haakon is also associated with the construction of Akershus Fortress ( Akershus Festning ) and Bohus Fortress ( Båhus festning ). During his reign he revived his brother's war policy against Denmark, but in 1309 he finally concluded a peace that in general was the end of a period of Dano-Norwegian wars. In domestic matters he energetically and successfully tried to limit the power of the magnates and to strengthen the king's power. In 1319, Haakon was succeeded by his daughter's son, Magnus VII , who was an infant. Haakon's daughter Ingeborg was recognized as formal regent of her son. Havtore Jonsson was put in the guardianship government until he himself died the following year. Haakon was buried in St. Mary's church ( Mariakirken ) in Oslo. Remains of two people, deemed to be Haakon and Eufemia, were discovered during excavations of the ruins of that church and reinterred in the royal mausoleum at Akershus Castle . [ 8 ] Head from Nidaros Cathedral , considered to possibly represent an older Haakon. [ 9 ] Burial site of Haakon V in Oslo A sculpture believed to depict Haakon V as Duke of Oslo, Oppland, Ryfylke, the Faroe Islands, and Shetland. [ 10 ] Seal of Haakon as Duke (obverse), in known use 1292–98; the Norwegian coat of arms appears on the reverse One-sided seal of Haakon as Duke, from 1298 Seal of Haakon as King (obverse), in known use 1305–18; the Norwegian coat of arms appears on the reverse Reverse of another version of Haakon's seal as King, in known use 1300–02 ↑ Lillehammer, Grete, et al. (1995) Museoteket ved Arkeologisk museum i Stavanger: Rogalandsfunn fra istid til middelalder , p. 108 ↑ "Haakon V Magnusson" . Encyclopædia Britannica . Retrieved 16 August 2026 . 1 2 Helle, Knut; Norseng, Per G. "Håkon 5. Magnusson" . Store norske leksikon (in Norwegian) . Retrieved 16 August 2026 . ↑ Narve Bjørgo , "Eirik Magnusson" in Norsk biografisk leksikon vol. II, (Oslo, 2000), pp. 436–437 ↑ Billing., Hansen, Bent (1990). Rosensverdslektens forfedre . B.B. Hansen. OCLC 866271168 . {{ cite book }} : CS1 maint: multiple names: authors list ( link ) ↑ "Agnes Håkonsdatter" . Store norske leksikon . Retrieved 18 July 2012 . ↑ Ingebjørg Håkonsdatter (Store norske leksikon) ↑ Håkon 5 Magnusson (Store norske leksikon) ↑ Helle, Knut (1995). Under kirke og kongemakt: 1130–1350 , p. 209. ↑ House of Sverre Helle, Knut (1964) Norge blir en stat, 1130–1319 (Universitetsforlaget) ISBN 82-00-01323-5 Holmsen, Andreas (1939) Norges historie. Fra de eldste tider til 1660 (Universitetsforlaget) Gjerset, Knut (1915) History of the Norwegian People (MacMillan Company, Volumes I & II) Harald I Fairhair Eric I Bloodaxe Haakon I the Good Harald II Greycloak Harald Bluetooth d & Haakon Sigurdsson r Olaf I Tryggvason Swein Forkbeard de & Eiríkr Hákonarson r & Sweyn Haakonsson r Olaf II the Saint Cnut de & Haakon Ericsson r & Sweyn Knutsson r ( Ælfgifu r ) Magnus I the Good d Harald III Hardrada Magnus II Haraldsson Haakon Toresfostre Magnus III Barefoot Eystein I Magnusson Sigurd I the Crusader

Harald IV Gille Magnus IV the Blind ( Sigurd Slembe ) Inge I Haraldsson Eystein II Haraldsson ( Magnus Haraldsson ) Haakon II Broadshoulder Magnus V Erlingsson Sverre Sigurdsson Haakon III Sverresson ( Guttorm Sigurdsson ) Inge II Bårdsson Haakon IV Haakonsson ( Haakon the Young ) Magnus VI the Law-mender Eric II Magnusson Haakon V Magnusson Magnus VII Ericsson s Haakon VI Magnusson s Olaf IV Haakonsson d Christian II ds Christian III d Frederick III d Christian VII d Christian Frederick Charles III John s d Also Danish monarch e Also English monarch s Also Swedish monarch Kristján X (Christian X) 13th-century Norwegian monarchs 14th-century Norwegian monarchs Fairhair dynasty Burials at the Royal Mausoleum (Norway) House of Sverre Norwegian dukes Royal reburials Articles with short description Short description is different from Wikidata Use dmy dates from August 2020 Articles containing Old Norse-language text Articles containing Norwegian-language text CS1 Norwegian-language sources (no) CS1 maint: multiple names: authors list Commons category link from Wikidata