HNK Hajduk Split, commonly referred to as Hajduk Split or simply Hajduk, is a professional Croatian football club founded in 1911, and based in the city of Split. Since 1979, the club's home ground has been the 35,000-seat Stadion Poljud. The team's traditional home colours are white shirts with blue shorts and socks. Hajduk was founded by a group of Split students in a famous tavern known as U Fleků in Prague. Between the early 1920s and 1940, Hajduk regularly participated in the Kingdom of Yugoslavia national championship. Following World War II and the formation of the Yugoslav league system in 1946, Hajduk went on to spend the entire SFR Yugoslavia period at the top level. The club's run continued following the breakup of Yugoslavia, as the club joined the Croatian First League in its inaugural season in 1992, never having been relegated from its top tier. They are one of the most successful teams in Croatia and ex-Yugoslavia, having won nine Yugoslav and six Croatian league championships, in addition to nine Yugoslav and five Croatian cup titles and five Croatian supercup titles, without ever being relegated from its countries top football league.