(where Stockholms Stadion is located) which is why the stereotypical view of the clubs supporters is, for them to be upperclass since Östermalm is considerwd one the wealthier parts of the city. However, a 2015 T-shirt campaign suggests that supporters are spread fairly evenly throughout all geographical and socio-economical areas of Stockholm. Although Djurgården's supporters have been organizing themselves since the late 1940s, with the founding of DIF Supporters Club back in 1947, the 1970s saw singing supporter sections emerging which led to a new supporter club to be founded in 1981, named Blue Saints. The supporter club later changed its name in 1997 to Järnkaminerna (lit. the Iron Furnaces) since the old name was perceived to be associated with violence. Järnkaminerna is Djurgården's official supporters' group with a membership of about 5800. The 2000s saw the emergence and creation of independent ultras groups. The oldest active ultra group, Ultra Caos Stockholm, formed in 2003 is largely influenced by southern European supporter culture. In 2005 Fabriken Stockholm was formed and took over the role of creating tifos for the team's games from a former, now abolished group, Ultras Stockholm, founded in the late 1990s. In 2013 a larger and more open organization (SOFIA TIFO) was formed and took charge of the terrace choreography, headed by Ultra Caos Stockholm. The ultras can be found on the lower part of Sofialäktaren/ the Sofia stand located in the south end of the stadium. The origins of the name comes from the hospital (Sofiahemmet) behind Stockholms stadion and the section where the ultras used to stand when they played there. Notable Djurgården supporters Fredrik Reinfeldt, former Prime Minister of Sweden Joakim Thåström, musician Stefan Persson, former CEO, Chairman of the Board and major shareholder of H&M Christer Fuglesang, astronaut, first Scandinavian in space Carl XVI Gustaf, king of Sweden Olof Palme, former Prime Minister of Sweden Lars Ohly, former leader of Vänsterpartiet Rivalries Djurgården's archrival is AIK. AIK was founded on February 15, 1891, and Djurgården just four weeks later on March 12, both in Stockholm City Centre. Because of this, games between the teams are called Tvillingderbyt (Derby of the twins) by the media, a name that has not caught on among supporters since they don't view themselves as such. They are also historically the biggest and most successful clubs from Stockholm, with 21 titles won by AIK and 17 by Djurgården. Games