The club plays at the 82,656 seater Stadio Olimpico, shared with S.S. Lazio. The two teams play one another each year in the Rome derby, a fiery, emotional match often marked with tension and occasional crowd trouble in and around the stadium. Two extreme incidents in particular have left their mark on the history of this fixture. In 1979, Lazio fan Vincenzo Paparelli was hit in the eye and killed by a flare fired by a Roma fan from the opposite end of the stadium (entering in Italian history as the first mortal episode of football-related violence), and in 2003 an unprecedented event occurred when the Roma Ultras forced the game to be suspended after spreading false rumours among the crowd present that a child had been killed by the police prior to the beginning of the game.
Roma's Ultras traditionally represented the working classes of the city, usually left-wing. During the last decades, however, an increasing number of fans have turned rightwards, acquiring some notoriety for the association of some of its members with the Italian extra-parliamentary extreme right (a trademark traditionally associated with S.S. Lazio). The fanbase is now extremely divided politically speaking, yet still shares the passionate support the club always drew (Roma is currently the fourth club in Italy in terms of support, right after the three biggest and most successful clubs Juventus, Inter and Milan).
Generally speaking, A.S. Roma fans are a majority in Rome.