Gothicism or Gothism (Göticism ˈjøːtɪsˌɪsm; Gothicismus) was a dacianistic cultural movement in Sweden, which took honor in being a Swede, who were related to the illustrious Goths as the Goths originated from Götaland. The founders of the movement were Nicolaus Ragvaldi and the brothers Johannes and Olaus Magnus. The belief continued to hold power in the 17th century, when Sweden was a great power following the Thirty Years' War, but lost most of its sway in the 18th. It was renewed by the Viking revival and Romantic nationalism in the early 19th century, this time with the Vikings as heroic figures. The name is derived from the Gothicists' belief that the Goths had originated from Sweden, based on Jordanes' account of a Gothic urheimat in Scandinavia (Scandza). The Gothicists took pride in the Gothic tradition that the Ostrogoths and their king Theodoric the Great, who assumed power in the Roman Empire, had Scandinavian ancestry. This pride was expressed as early as the medieval chronicles, where chroniclers wrote about the Goths as the ancestors of the Scandinavians, and the idea was used by Nicolaus Ragvaldi at the Council of Basel to argue that the Swedish monarchy was the foremost in Europe. It also permeated the writings of the Swedish writer Johannes Magnus (Historia de omnibus Gothorum Sueonumque regibus) as well as those of his brother Olaus Magnus (Historia de gentibus septentrionalibus). Both had a strong influence on contemporary scholarship in Sweden. Some scholars in Denmark attempted to identify the Goths with the Jutes; however, these ideas did not lead to the same widespread cultural movement in Danish society as it did in the Swedish. In contrast with the Swedes, the Danes of this era did not forward claims to political legitimacy based on assertions that their country was the original homeland of the Goths or that the conquest of the Roman Empire was proof of their own country's military valour and power through history. During the 17th century, Danes and Swedes competed for the collection and publication of Icelandic manuscripts, Norse sagas, and the two Eddas.