This is what we found on Wikipedia regarding the Munster Rugby:

Munster Rugby (Irish: Rugbaí Mumhan) is one of the professional provincial rugby teams from the island of Ireland. They compete in the United Rugby Championship and the European Rugby Champions Cup. The team represents the IRFU's Munster Branch, which is responsible for rugby union throughout the Irish province of Munster. The team motto is "To the brave and faithful, nothing is impossible." This is derived from the motto of the MacCarthy clan – "Forti et Fideli nihil difficile". Their main home ground is Thomond Park, Limerick, though some games are played at Musgrave Park, Cork.