Leinster Rugby is one of the island of Ireland's four professional provincial rugby union teams. They compete in the United Rugby Championship and the European Rugby Champions Cup.
Leinster primarily plays its home games at the RDS Arena, however larger games are played at the Aviva Stadium when the RDS's capacity 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 with white or yellow trim and the team crest features a harp inside a rugby ball, the harp being an ancient symbol of this The province was found in and adopted from the flag of Leinster, although due to Leinster Rugby's traditional colors the design is more similar to the flag of the President of Ireland or the coat of arms of Ireland.