Gothicismus (Sweish: Göticism) is the name given to what is considered to have been a cultural movement in Sweden. The founders of the movement were Nicolaus Ragvaldi, the brothers Johannes Magnus, Olaus Magnus and Olof Rudbeck d.ä.. They all held the belief that the Goths had originally lived in Sweden. This myth 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 revitilized by national romanticism in the early 19th century, this time with the vikings as heroic figures.