Leinster Rugby (Irish: Rugbaí Laighean) is one of the four professional provincial rugby teams from Ireland. They compete in the domestic league of the Pro12 and the Rugby Champions Cup. The team represents the Irish Rugby Football Union (IRFU) Leinster Branch, which is one of four primary branches of the IRFU and is responsible for rugby union throughout the geographical Irish province of Leinster.
Leinster play their home games primarily at the RDS Arena, although larger games are played in the Aviva Stadium when the capacity of the RDS is insufficient.Before moving to the RDS in 2005, Leinster’s traditional home ground was Donnybrook Stadium, in Dublin 4. The province plays primarily in blue and the team crest features a harp within a rugby ball, the harp being taken from the flag of Leinster.