the name of the church, this time in the Swedish Crusade to Småland in Sweden. The inhabitants had reportedly renounced Christianity and were again worshiping Old Norse deities. Death Sigurd died in 1130 and was buried in Hallvard's church (Hallvardskirken) in Oslo. Sigurd was married to Malmfred, a daughter of Grand Prince Mstislav I of Kiev and granddaughter of King Inge I of Sweden. They had a daughter, Kristin Sigurdsdatter. He left no legitimate sons. Magnus, his illegitimate son with Borghild Olavsdotter, became king of Norway. He shared the throne in an uneasy peace with another claimant, Harald Gille. This led to a power struggle following Sigurd's death between various illegitimate sons and other royal pretenders, which escalated into a lengthy and devastating civil war. This gave rise to long feuds over who should rule the Kingdom of Norway in the 12th century and early 13th century. Primary sources Most of the information gathered about the saga of Sigurd and his brothers is taken from the Heimskringla, written by Snorri Sturluson around 1225. The accuracy of this work is still debated by scholars. Sigurd is also mentioned in various European sources. In theatrical works In the 19th century, Bjørnstjerne Bjørnson wrote a historical drama based on the life of the king, with incidental music (titled Sigurd Jorsalfar) composed by Edvard Grieg. Notes Other sources Bergan, Halvor (2005) Kong Sigurds Jorsalferd. Den unge kongen som ble Norges helt (Norgesforlaget) Morten, Øystein (2014) Jakten på Sigurd Jorsalfare (Spartacus) Related reading Riley-Smith, Jonathan (1986) The First Crusade and the Idea of Crusading (University of Pennsylvania Press) External links Sigurd the Crusader: Stories from His Saga 1089 births 1130 deaths 12th-century rulers of the Kingdom of the Isles 12th-century Norwegian monarchs Monarchs of the Isle of Man Norwegian Roman Catholics Roman Catholic monarchs House of Hardrada Medieval child monarchs Burials at Akershus Fortress Christians of the Norwegian Crusade History of Bohuslän