Leinster Rugby is one of four professional provincial club rugby teams on the island of Ireland. They compete in the United Rugby Championship and the European Rugby Champions Cup.
Leinster mainly play their home games at the RDS Arena, although larger matches are played at the Aviva Stadium if 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 county mainly plays in blue with a white or yellow border and the team crest features a harp inside a rugby ball, with the harp is an old symbol of the RDS. the province found in and taken from the flag of Leinster, although the traditional colors of Leinster Rugby make the design more similar to the flag of the President of Ireland or the coat of arms of Ireland.