Founded in 1987, "Irriducibili Lazio" were the club's biggest ultras group for over 30 years. They typically create traditional Italian ultra displays during the "Derby della Capitale" (Rome Derby), the match between Lazio and their main rivals, Roma. It is amongst the most heated and emotional footballing rivalries in the world, such as where Lazio fan Vincenzo Paparelli was killed at one of the derby games during the 1979–80 season after being hit in the eye by an emergency rocket thrown by a Roma fan. A minority of Lazio's ultras used to use swastikas and fascist symbols on their banners, and they have displayed racist behaviour in several occasions during the derbies. Most notably, at a derby of the season 1998–99, laziali unfurled a 50-metre banner around the Curva Nord that read, "Auschwitz is your town, the ovens are your houses". Black players of Roma have often been receivers of racist and offensive behaviour. After 33 years, the Irriducibili disbanded on 27 February 2020, citing "too much blood, too many banning orders, too many arrests." Lazio's ultras now go by the name "Ultras Lazio". Lazio also have a strong rivalry with Napoli and Livorno, as well as with Pescara and Atalanta. The club also maintains strong competitive rivalries with Fiorentina, Juventus, and Milan.