Leinster Rugby is one of the four professional provincial
rugby teams from the island of
Ireland and the most successful Irish team both domestically and in European competition. They compete in the
Pro12 and the
European 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.